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Slow speed granulators
Slow speed granulators run at low speeds. They are used primarily as in-line shredders for deadheads and defective parts in the injection and blow moulding industries. Thanks to different hopper and extraction systems, the machines can be integrated into various types of existing installations.
Within the framework of our supply range, we can offer you new ZERMA low-speed beside-the-press granulators and, as an alternative, completely overhauled used machines from renowned manufacturers, such as Alpine, Pallmann, Getecha, Wanner, Rapid or Tria.
Our specialist workshop can professionally refit any used cutting mill so that it will be delivered with our tried and tested warranty for second-hand equipment.
Areas of Application
Designed as low-speed machines, our Zerma beside-the-press granulators from the GSL 150 and GSL 180 series are intended especially for applications in the injection moulding industry (deadheads and lightweight rejects).
Drive units with a capacity between 1.5 and 4 kW and rotor diameters of 150 and/or 180 mm ensure working widths between 150 and 430 mm. Low noise emissions and virtually dustless regrind are two of the major advantages offered by low-speed granulators. Thanks to that, they can easily be used directly next to an injection moulding machine in in-line recycling processes.
The regrind is usually extracted by a vacuum conveyor and directly returned to the injection moulding machine. As an alternative, the machine can be used as an autonomous “central granulator”.
In this case, the machine is affixed to a high frame so that the material can be filled into bags or trolleys.
The GSL 300 series has been designed primarily for use as a shredder for production-related rejects in the injection and blow moulding industries.
Such rejects also include large parts, such as car door panels, bumpers or hollow bodies. This series comes with capacities between 7.5 and 18.5 kW, working widths of 400, 600 and 800 mm, and a rotor diameter of 300 mm.
Our machines from the GSL series have been designed for throughputs from 15 to 200 kg/hour.
Technical Data / Description
- The machines are delivered on a low travelling mechanism. A high version is available as an alternative.
- Easy, tool-free access to the knives and the screen.
- Thanks to the V-arrangement of the rotor knives, the shredded material is kept at the rotor centre, which reduces wear on the grinding chamber walls.
- As the rotor assemblies are offset, only individual knives are used so that their cutting force increases.
- Even after the special rotor knives have been re-sharpened, the cutting gap remains unchanged without the need for any adjustment work.
- The stator blades can be turned in four ways.
- The rotor shaft is supported by bearings on both sides.
- There are several hopper versions and options available.
Mode of Operation
The material is fed in through a soundproofed feed hopper. After that, the rotating rotor knives and the stationary stator blades shred the material until it is small enough to fall through the screen underneath the rotor. Now in the suction trough, the regrind is either returned to the injection moulding machine using a vacuum conveyor, or it falls through a discharge trough into a movable regrind box or a bag.
