Wet Size Reduction & Pre-Washing

Wet Plastic Crusher for Enhanced Recycling

Q: How does the machine prevent contaminated process water from damaging bearings and motor drives?

Bearings are mounted in external pillow blocks completely separated from the cutting chamber by an open air gap. The rotor shaft entry points are engineered with dual mechanical labyrinth seals and water slinger rings. Even under heavy wash slurry conditions, dirty process water cannot penetrate the bearing housings.

Q: How much water is required for wet crushing, and can recycled process water be used?

Water consumption typically ranges from 2 to 8 m³/h depending on machine capacity and contamination levels. The system is fully compatible with recirculated water from settling ponds or wastewater treatment clarifiers; fresh water is only required if final flake rinsing specifications demand it.

Q: What rotor blade configuration is recommended for thin agricultural film vs. rigid HDPE bottles?

For agricultural and packaging films, an open-rotor V-cut scissor configuration with counter-skewed bed knives delivers continuous slicing without winding. For rigid HDPE bottles and crates, a paddle-type staggered rotor provides aggressive high-impact crushing with high bulk density. Knives are crafted from D2 (1.2379) tool steel heat-treated to HRC 58–60.

Heavy-duty wet granulation engineered for dirty post-consumer plastics, combining simultaneous high-throughput size reduction, hydrodynamic blade cooling, and in-chamber pre-washing.

Continuous water spray suppresses cutting friction and eliminates polymer thermal smearing.
Isolated outboard pillow blocks with labyrinth seals completely prevent water ingress.
D2/DC53 alloy tool steel knives engineered for contaminated agricultural film and sandy rigid scrap.

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Integrated Size Reduction & Hydrodynamic Pre-Washing

Simultaneous Size Reduction, Friction Cooling & Soil Removal

Standard dry granulators struggle when processing post-consumer agricultural films, dirty bottles, and high-grit plastics. Cutting friction generates localized heat that melts soft polymers onto blade tips, while embedded sand and debris accelerate abrasive knife wear.

Rumtoo’s Wet Plastic Crusher introduces continuous, high-volume water injection directly into the cutting chamber. The turbulent water slurry provides instant boundary lubrication, suppresses blade temperatures, and subjects the chopped flakes to intensive hydrodynamic scrubbing—stripping soil, labels, and beverage residues before the material ever reaches downstream washing tanks.

Key Advantages of Wet Plastic Granulation

Engineered for extreme contamination tolerance, prolonged knife service intervals, and seamless washing line feeding.

Multi-Point Water Injection Pre-Washing

Internal high-pressure nozzles create a turbulent water slurry that scrubs away surface sand, dirt, and sticky residues during the cutting stroke, reducing washing tank burden.
Hydrodynamic Blade Cooling & Anti-Melting

Continuous water circulation dissipates frictional heat instantly, preventing thin film glazing, polymer softening, and blade edge gumming common in dry granulation.
Hardened D2 Tool Steel & Chamber Liners

Rotary and fixed knives are forged from vacuum heat-treated D2 (1.2379) / DC53 tool steel (HRC 58–60) with replaceable wear plates to resist heavy abrasive slurry wear.
Outboard Bearings with Labyrinth Slurry Seals

Heavy-duty spherical roller pillow blocks are mounted externally with physical air gaps, water slinger rings, and multi-stage labyrinth seals to guarantee zero water penetration.

Wet Plastic Crusher Applications

Optimized for dirty post-consumer streams where simultaneous grinding, cooling, and contamination stripping are required.

Agricultural & Mulch PE/PP Films

High-grit baled greenhouse films, silage stretch wrap, and irrigation tubing with heavy soil and sand content flushed directly during chopping.
Post-Consumer PET & HDPE Bottles

Baled beverage bottles, detergent jugs, and thermoformed containers; water spray assists label detachment and syrup residue purging during reduction.
Contaminated Post-Industrial Rigid Scrap

Dirty sorting crates, battery casing shred, and regrind lumps washed and size-reduced prior to sink-float density separation.
Turnkey Washing Line Integration

Continuous slurry discharge directly into screw conveyors, friction washers, or dewatering centrifuges in high-capacity automated recycling lines.

Wet Plastic Crusher Specifications

Model	Main Motor (kW)	Rotor Dia. × Length (mm)	Rotor / Bed Knives	Water Inflow (m³/h)	Throughput (kg/h)
PC-600W	30 – 37	600 × 600	6 / 4	2 – 3	400 – 600
PC-800W	45 – 55	800 × 800	8 / 4	3 – 5	700 – 1,100
PC-1000W	75 – 90	1000 × 1000	10 / 4	5 – 8	1,200 – 1,800
PC-1200W	110 – 132	1200 × 1200	12 / 4	8 – 12	2,000 – 3,000

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Frequently Asked Questions

What are the primary operational benefits of wet granulation over dry granulation?

Wet granulation introduces continuous water spray directly into the cutting chamber. The water acts as a cooling agent, lubricant, and hydraulic cleaner: it eliminates friction heat to prevent low-melt films from smearing, lowers blade sharpening frequency by up to 2–3x, flushes abrasive dirt and sand away from the cutting edges, and strips initial label residues and food contaminants before the main wash line.

How does the machine prevent contaminated process water from damaging bearings and motor drives?

How much water is required for wet crushing, and can recycled process water be used?

What rotor blade configuration is recommended for thin agricultural film vs. rigid HDPE bottles?

Warranty & Global Installation Support

12-Month Structural Warranty

Heavy-duty structural chambers, rotor shafts, and drive assemblies are backed by a comprehensive 12-month industrial warranty with readily available wear components.
Commissioning & Hydraulic Setup

Our engineering team provides technical support for piping connections, water flow rate calibration, spray nozzle positioning, and knife clearance tuning.
Washing Line System Integration

Seamless downstream mechanical pairing with friction washers, sink-float separation tanks, dewatering centrifuges, and water filtration clarifiers.

Request a Wet Plastic Crusher Quote

Tell us your feedstock type (agricultural film, post-consumer PET/HDPE bottles, or contaminated rigids), target capacity (kg/h), and water recycling setup. Rumtoo engineers will provide a customized wet crushing recommendation with complete hydraulic and power specs.

Washing Lines, Shredders, Crushers & Pelletizing Systems