W8.30 PreCut – Pre-shredder for waste and RDF production

Users benefit from reproducible and stable process control via a Siemens S7 controller with a large touchscreen display. The controller allows for flexible adjustment of rotor speed and slide timing to suit different waste streams, which improves throughput stability and repeatability, thereby minimising production fluctuations.

The externally adjustable SuperCut counter-blade system, featuring angled protective cover plates, ensures consistent material preparation. This enables high repeatability of cut dimensions and easy maintenance thanks to the ability to turn the blades without complex disassembly, thereby enhancing process reliability in downstream processes.

Material is fed to the rotor via a swing ram. The swing ram mounting, which is located on the outside of the pre-shredder, ensures maximum cutting chamber volume. The swing gate can be optionally fitted with a pressure plate to hold the material even more securely in position against the rotor. In addition, a turbo hydraulic system is used to enable faster swing ram movements and, consequently, higher throughput rates.

Automatically centrally lubricated bearing assemblies for the rotor, slide valves and inspection hatches reduce the need for manual maintenance and prevent lubrication errors. This enables scheduled maintenance windows, minimises unplanned downtime and extends the service life of critical moving parts in continuous operation.

The solid PreCut rotor comes as standard with Vautid wear protection, making it particularly resistant to foreign materials. The bolted-on octagonal cutting blades have an edge length of 100 or 130 mm – the largest in the entire WEIMA range. Thanks to its easy accessibility, the rotor is still easy to maintain. Speed is adjustable from 5 to 120 rpm.

Adjustable heavy-duty feet ensure safe and low-vibration operation even on uneven production surfaces. This contributes to process stability, as vibrations are reduced and mechanical stress on the cutting units and bearings is minimised.

The choice is yours: our pre-shredders can be fitted with either a Hägglunds hydraulic drive or a high-torque drive from Baumüller. Which one is right for you always depends on your specific application.

The machine is designed with standardised interfaces to process peripherals, which facilitates connection to various conveying, sorting and separation systems. This modular integration capability gives the user greater flexibility in planning plant configurations and enables them to expand existing lines cost-effectively.

The firmly bolted and replaceable screen comb within the robust frame enhances the machine’s structural stability under extreme loads. This reduces the risk of deformation under full load and improves long-term reliability and process safety.

Hydraulically operated inspection hatches at the front and rear provide direct access to the screen and rotor. This allows the operator easy access for maintenance, blade replacement or the removal of foreign objects, thereby reducing average downtime and increasing machine availability.