NGR
The evolution of the market leader
NGR's flagship shredder-feeder-extruder, with over 1,200 patented installations worldwide since 1997. The S:GRAN is the perfect solution for processing scrap plastic materials of a variety of types, materials and shapes created by industrial processes — even thick-walled parts, fibres and textiles can be processed without additional pre-shredding.
The recycling technology of the S:GRAN meets even the highest standards for efficiency and achieves zero-waste production — all production waste is fed back in — thanks to material-conserving shredding and optimally guided extrusion.
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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, a hydraulic ram pushes the material into the shredder drum.
The shredder and extruder drives are controlled separately and automatically, based on load.
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.
This patented combination of shredder, feeder and extruder is a feature of all units in the S:GRAN line.
Slow-turning shredder blades grind the waste and feed it continuously to the extruder in a single process.
Handles large, thick waste without pre-shredding — as long as the pieces fit the hopper opening.
Hopper level is measured continuously and the feed auto-regulates for discontinuous filling; restart in under 2 minutes.
The NGR touchscreen manages all functions with recipe management for full traceability.
Universal extruder screws optimised for recycling, with custom geometries available on request.
Consistent pellet size ensures homogeneous mixing back into new material with minimal loss.
| Model | Extruder screw Ø (mm) | Shredder width (mm) | Max output (kg/h) | Max output (lbs/h) |
|---|---|---|---|---|
| S:GRAN 65-50 | 65 | 500 | 250 | 550 |
| S:GRAN 75-70 | 75 | 700 | 400 | 880 |
| S:GRAN 85-70 | 85 | 700 | 500 | 1,100 |
| S:GRAN 95-70 | 95 | 700 | 600 | 1,320 |
| S:GRAN 105-100 | 105 | 1,000 | 700 | 1,540 |
| S:GRAN 125-100 | 125 | 1,000 | 900 | 1,980 |
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.
Designed for plastics printed, for example, on all surfaces and/or moist plastics. The simple venting unit can be supplemented by another modular unit with two venting openings and an additional vacuum pump.
In addition to the modular venting unit, a combination of water ring pump and high-performance vacuum pump runs in order to increase the vacuum performance (e.g. PET processing).
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.
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.
For heavily contaminated materials. In contrast to the standard backflush screen changer with 2 screen cavities, this system is equipped with 4 screen cavities. The double filtration surface with the same frame size results in a longer filter life.
For high contamination at high throughput rates. With the lowest melt losses and low filter costs, fully automatic operation ensures excellent filtration results. It is used particularly for post-consumer plastics.
The continuous melt filters in the ERF series are suitable for a wide range of moderate and highly contaminated polymers and provides a pressure constant operation, long screen lifes, very low melt losses and a compact design. By the permanently rotating filter drum foreign particles are being constantly and effectively removed, depending on the application ERF melt filters enables throughputs from 150 to 10,000 kg/h.
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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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