NGR
The multi-talented high performer
A compact shredder-feeder-extruder for scrap plastic products created in industrial processes — high performance in a limited footprint. The A:GRAN reprocesses start-up lumps and industrial scrap without pre-grinding.
← All NGR machinesAt a glance
Plastic waste is processed by a heavy duty shredder operating at low speed for gentle size reduction and minimal loss of material properties. In this process, pneumatic rams push the material into the shredder drum. After shredding, the material is fed directly into the extruder.
In the extruder, the material is brought to a uniform melt temperature and degassed, if necessary. All the components are positioned in close proximity to prevent oxidation of the material and to make optimal use of heat from the shredding process.
Shredder, feeder and extruder lie along one axis and are driven by a single motor. This patented combination of shredder, feeder and extruder is a feature of all units in the A:GRAN line.
Start-up lumps and industrial scrap are reprocessed directly — the low-speed shredder gently preserves plastic properties.
A material-conserving shredder with minimal energy consumption enables complete production-waste recycling.
Switches on and off quickly for discontinuous waste streams, with automatic start-up and shutdown by a single button.
Shredder, feeder and extruder operate simultaneously in a single continuous process.
| Model | Extruder screw Ø (mm) | Shredder width (mm) | Max output (kg/h) | Max output (lbs/h) |
|---|---|---|---|---|
| A:GRAN 65-40 | 65 | 400 | 100 | 220 |
| A:GRAN 70-40 | 70 | 400 | 120 | 270 |
The air separator is used in the production process to continuously recycle film edge trim, which is fed pneumatically into the machine. With "inline operation," further material handling is unnecessary, and the NGR recycling machine is now fully automated.
With variable feed speed, roll scrap is treated in a process-controlled manner. The virtually unmanned machine is fed continuously. The roll feeder can be operated at the same time with other types of feeding (e.g. conveyor belt).
The conveyor belt transports the feed material through a metal detector into the feed hopper. The belt is stopped automatically, if metallic matter is detected in order to remove it.
Additives such as color pigments, CaCo3, compatibilizers can be added to the material flow in a process-controlled manner. Dosing systems for pellet and/or powdered additives are available.
Designed for light printing and low humidity. The vacuum degassing system includes a vacuum pump and is connected to two venting ports on the extruder.
Each venting combination can be equipped with a closed water circuit. The fresh water consumption at the vacuum pump is thereby reduced significantly.
For thermoplastics with a higher viscosity. The melt exits through the wear-resistant die plate, and is knocked off by the pelletizer blades. The pellets cooled in the water ring are flushed out, dried in the centrifuge and discharged. By adjusting the blade pressure, pelletizer blades provide a long service life; replacement is quick and easy.
For low-viscosity melts. The melt emerges from strand nozzles, is cooled in a water bath, dried by means of a fan and cut to the desired length in the pelletizer. The result is cylindrical, dust-free pellets with excellent mixing properties.
In addition to the benefits of the SP, the A-SP option offers the added convenience of fully automated start-up. The strands are transported automatically by a water slide to the pelletizer, and the pellets are dried in a centrifuge.
Specially designed for inline applications where water is not used. The melt exits through the wear-resistant die plate, and is knocked off by the pelletizer blades. The pellets are carried away in the air stream and cooled.
For difficult-to-process (e.g. sticky) polymers or thermoplastics with a very high melt flow index. The melt emerges from the die plate and is knocked off by the pelletizer blades. The whole process takes place under water. In the centrifuge, the pellets are separated from the process water and dried.
For clean, in-house production waste. Using the manual lever, two screens can be swung out alternately to allow for cleaning of the melt stream. The process is discontinuous, because the machine has to be switched off to change the screen.
For light impurities. The hydraulically operated double-piston screen changer allows continuous filtration of the melt. This allows a screen change without process shutdown.
For heavily contaminated materials. The hydraulically operated double-piston screen changer filters the melt in a process-controlled and continuous manner. The integrated backwash device automatically cleans the screens. The number of back-flushes and the related service life of the screens depend on the degree of contamination of the material.
The throughput scale is integrated in the machine control system and displays the current production output in kg/h (lbs/hr). The data can be logged in a BDE system.
This unit provides quality control by continuously measuring pellet density. Based on preset parameters, the unit determines whether to switch the gates to the second choice or to scrap when this value falls below a setpoint. Monitoring is inline and integrated continuously in the production process.
For continuous melt viscosity measurement. Melt is taken from the production extruder, the viscosity is measured, and then the melt is returned to the extruder. Based on the differential pressure across the capillary, the viscosity of the material (IV value, MVR) is determined by means of a stored recipe.
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