Roll Feeder
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).
NGR
Wet & Contaminated Waste Recycling
C:GRAN
The cutting specialist for wet materials
Overview
C:GRAN — wet & contaminated waste recycling machine
A cutter-compacter-extruder combination designed to process flakes or films with residual moisture of up to 12% without problems, thanks to excellent pre-drying properties in the cutter bin.
← All NGR machinesAt a glance
- Preparation of flakes and films with residual moisture up to 12 %
- Output rate up to 3,000 kg/h (6,610 lbs/h) depending on type
- Maximum automation thanks to AUTO-Pilot
- Ideal as a component of a cascade or compounding system
- Compatible with a wide range of melt filters
How it works
The operating principle of C:GRAN
The shredding, homogenization and drying/heating of the plastic waste takes place in the cutter bin by rotating blades. Specially arranged feeders ensure additional compaction of the material. The cut and dried material is conveyed into the extruder screw by centrifugal force and feeders.
The automatic intake slider ensures constant extrusion conditions. The advanced extruder screw technology allows gentle melting even at high throughput rates.
Key features
Why the C:GRAN
Advanced material preparation
An enlarged cutter bin with fast-moving rotor blades and efficiently arranged guides delivers continuous energy input for optimal readiness.
Handles up to 12% moisture
Heating in the cutter bin dries wet materials straight from washing plants — no separate drying step.
AUTO-Pilot automation
Autonomous control of feed, energy input and extruder load — maximum automation without manual intervention.
System flexibility
An ideal component for cascade extruders or compounding systems, compatible with a wide range of melt filters.
Uniform pellet quality
Optimised screw design gives the best homogenisation at high output and low energy demand.
Technical data
Specifications
| Model | Extruder screw Ø (mm) | Cutter bin Ø (mm) | Max output (kg/h) | Max output (lbs/h) |
|---|---|---|---|---|
| C:GRAN 85-130 | 85 | 1,300 | 550 | 1,210 |
| C:GRAN 105-150 | 105 | 1,500 | 800 | 1,760 |
| C:GRAN 125-150 | 125 | 1,500 | 1,200 | 2,650 |
| C:GRAN 145-170 | 145 | 1,700 | 1,500 | 3,310 |
| C:GRAN 165-170 | 165 | 1,700 | 1,800 | 3,970 |
| C:GRAN 185-200 | 185 | 2,000 | 2,200 | 4,850 |
| C:GRAN 205-200 | 205 | 2,000 | 2,500 | 5,510 |
| C:GRAN 225-200 | 225 | 2,200 | 3,000 | 6,610 |
Options & accessories
Add-Ons
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.
Dosing unit
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.
Single Venting
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.
Double Venting
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.
Cascade
The cascade downstream of the melt filtration is equipped with a special degassing zone (Power Venting Section). This guarantees continuous renewal of the melt surface for removing volatile impurities from the melt for highest degassing requirements.
Vacuum pump with closed water circuit
Each venting combination can be equipped with a closed water circuit. The fresh water consumption at the vacuum pump is thereby reduced significantly.
Hot-die Waterring Pelletizer (HD)
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.
Strand pelletizer (SP)
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.
Automatic strand pelletizer (A-SP)
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.
Underwater pelletizer (UWP)
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.
Double-piston screen changer
For light impurities. The hydraulically operated double-piston screen changer allows continuous filtration of the melt. This allows a screen change without process shutdown.
Back-flush screen changer
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.
4K back-flush filtration
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.
Band melt filter
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.
High-performance melt filter
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.
Flow scale
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.
Gas control unit
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.
Online Viscometer
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.
Materials & applications
What it processes
Suitable materials
LDPE, PP, PE, PC, PPS, ABS & blends
Post-washing-line flakes
Regrind & film flakes
Pressed / mixed fractions
Applications
Post-industrial recycling (PIR)
Post-consumer recycling (PCR)
Wet & contaminated waste recovery
Gallery
Material samples the C:GRAN processes
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