Herbold
EWS / DWS
Coarse pre-shredding for bulky, thick-walled plastics
EWS / DWS — single- & double-shaft shredders
Herbold single-shaft (EWS) and double-shaft (DWS) shredders handle the first, coarse size-reduction step of the recycling chain — reducing used, mixed and contaminated plastics to a size that downstream granulators and washing lines can process. The EWS is a further development of the standard HR series for high throughputs and difficult tasks, in dry or wet operation.
Why the EWS / DWS
Countershaft drive, no gearbox
The EWS drives through a countershaft without a fault-prone gearbox, giving optimum protection against damage from foreign bodies; high-inertia pulleys absorb shock loads efficiently.
Variable knife configuration
A rotor roller with easily replaceable knife cassettes and adjustable stator knives, with optional wear-proof rotor and stator executions and a water-cooled rotor.
Externally mounted bearings
Oversized spherical roller bearings sit in external steel pillow blocks, completely separated from the grinding chamber — ideal for wet operation.
Fast maintenance
Hydraulically swivelling / hingeable screen cage and replaceable grinding chamber allow rapid screen changes and knife exchange; PLC control with programmable feed.
DWS 45/160 double-shaft
A large rotor working surface gives excellent ingestion performance for materials that traditional shredders could only feed in batches — big-bags and large voluminous containers. Screen selection sets a uniform, constant granular size, so unlike conventional two-shaft shredders without a screen no long stripes arise; suitable for dry or wet operation.
DWS construction detail
Open-design hopper for direct or conveyor feeding in stable ribbed welded steel; identical screwed cutting blocks usable on both sides, mounted in exchangeable cassettes that positively insert into the rotor or a stator knife support; rotor prepared for cooling-water circulation with optional anti-wear plating; four exchangeable screen baskets per side with manual tilt-down and big inspection doors.
EWS-R pipe shredder
For pipes up to 1,000 mm diameter and 12,000 mm long, plus start-up lumps: material is placed in a tiltable storage trough, the supply hopper tips it in, and a hydraulic stamp pushes it onto the rotor under automatic load control — producing free-flowing chips, not thin strips, so re-granulation is usually unnecessary.
Specifications
| Range | Single-shaft (EWS / EWS 60-210) & double-shaft (DWS 45/160) |
|---|---|
| EWS-R pipe capacity | Pipes up to 1,000 mm diameter × 12,000 mm long |
| Max thick-wall pipe (range) | Up to 2,200 mm diameter |
| Operation | Dry or wet; optional double drive & overload coupling |
What it processes
Suitable materials
Applications
EWS / DWS in detail
Explore the range
HGS
Guillotine Cutting Machine.
HGM
Combined Shredder-Granulator.
SML
Light-to-Medium Duty Granulator.
Works well with
- S:GRAN (NGR) — Pelletise the washed regrind for reuse.
- COLLIN Polytest Line (COLLIN) — Qualify the recyclate produced downstream.
Interested in the Herbold EWS / DWS?
Speak to our machinery specialists in Pakistan for a tailored quotation.
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