PVC Plastic Grinding Machine
High-precision disc pulverizing system engineered to transform rigid PVC regrind, PE/PP pellets, and polymer scrap into calibrated 20–100 mesh powder with integrated water cooling and closed-loop screening.
- Dual water-jacket and pneumatic airflow cooling prevents thermal degradation and polymer melting.
- Micrometer disc gap adjustment yields consistent 20–100 mesh (150–800 µm) powder for compounding.
- Closed-loop vibratory sifter automatically re-circulates coarse tailings for 100% finished yield.
Core Engineering Advantages
Built for thermal stability, high wear resistance against mineral fillers, and zero-loss closed-loop powder classification.
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Dual Water & Air Thermal Control
Internal chilled-water cooling channels around the stator housing combined with high-CFM negative-pressure air circulation keep exit powder below 60°C, preventing PVC plasticizing, discoloration, or melting.
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Calibrated 20–100 Mesh Fineness Control
Exterior micrometer feeler adjustment allows operators to calibrate disc clearances from 0.1 mm to 0.5 mm without dismantling the chamber, achieving exact particle size distributions from 150 to 800 microns.
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High-Chromium Wear-Resistant Discs
Grinding disc segments are forged from Cr12MoV / SKD11 alloy tool steel vacuum heat-treated to HRC 58–62. Engineered to withstand high-CaCO3 filler abrasion, each disc set can be re-sharpened 3 to 4 times.
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Closed-Loop Vibratory Sifting & Return
Integrated vibratory rotary screen separates on-spec powder directly into the bagging cyclone while automatically diverting oversized tailings back to the infeed chute for 100% material conversion.
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Pulse-Jet Negative Pressure Dust Filtration
Fully enclosed pneumatic conveying with high-efficiency cyclone discharge and auxiliary pulse-jet baghouse filters maintains an airtight, negative-pressure working environment meeting OSHA/ATEX plant standards.
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Load-Sensing Vibratory Infeed & Metal Trap
Automated electromagnetic vibratory feeder with current-sensing speed regulation prevents motor overload. Upstream neodymium drawer magnets capture ferrous tramp metal before it reaches the rotating disc.
Grinding Materials & Powder Applications
The RTM FineGrind series produces high-bulk-density thermoplastic powder tailored for recycling, compounding, rotational molding, and extruded profiles.
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PVC Pipe & Profile Regrind Compounding
Milling rigid PVC granulator flakes into 30–60 mesh powder for direct dry-blend feeding in twin-screw extruders, drainage pipe fittings, and window profile manufacturing.
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PE & PP Rotational Molding Feedstock
Micronizing virgin and recycled polyethylene (LLDPE/HDPE) pellets into 35–50 mesh powder with high bulk density and smooth flowability for water tanks, kayaks, and hollow containers.
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Masterbatch & Polymer Additive Blending
Grinding polymer carrier resins and pelletized compounds into fine powder to achieve uniform color pigment dispersion and additive homogenization in compounding lines.
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PVC Flooring & Calendered Sheet Scrap
Transforming edge trims, luxury vinyl tile (LVT) punchings, and sheet roll scraps into consistent powder for re-incorporation into backing layers without resin thermal degradation.
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EVA / Rubber Footwear Sole Recycling
Pulverizing cross-linked EVA foam, shoe sole trims, and TPR footwear scrap into micronized powders for reclaimed compounding batches and molded sheet production.
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Wood-Plastic Composites (WPC)
Generating calibrated polymer powder for intimate high-shear dry blending with wood flour, natural fibers, and coupling agents before high-output profile extrusion.
Engineering Layout & Operating Principles
From electromagnetic infeed to automated cyclone bagging, each sub-system is synchronized to maintain high powder throughput with minimal thermal rise.
High-Velocity Rotary Disc Chamber
The core grinding cell consists of precision-balanced stationary and high-speed rotary discs fitted with interlocking alloy teeth. Material enters the center of the discs and accelerates radially outward under centrifugal force, undergoing progressive shear, impact, and micro-attrition.
- Water-jacketed stator continuously dissipates frictional heat buildup.
- External micrometer gap control calibrates micron fineness on the fly.
- Dynamic rotor balancing eliminates vibration and extends bearing service life.
Pneumatic Conveying, Sifting & Cyclone Discharge
Discharged powder is instantly entrained into a high-CFM negative-pressure airstream powered by a heavy-duty exhaust fan. The airflow rapidly cools the powder as it travels to the rotary vibratory screen.
- Precision vibratory screen separates on-spec powder from coarse fractions.
- Automated closed-loop return duct conveys oversize particles back for re-milling.
- Dual-port bagging cyclone with rotary airlock facilitates dust-free packaging.
Technical Specifications
Compare the RTM FineGrind models to select the optimum rotor diameter, motor rating, and hourly throughput for your facility.
| Model | Main Power (kW) | Rotor Dia. (mm) | Fan Power (kW) | Disc Teeth (Rotary + Stator) | Vibratory Screen (mm) | Throughput (kg/h) | Weight (kg) |
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| RTM FineGrind 500 | 22 | 500 | 4 | 12 + 24 | 800 | 150 – 200 | 1,500 |
| RTM FineGrind 600 | 37 | 600 | 5.5 | 13 + 26 | 1,000 | 200 – 450 | 2,000 |
| RTM FineGrind 800 | 55 | 800 | 11 | 15 + 32 | 1,200 | 500 – 800 | 2,800 |
Swipe horizontally to view the full table.
PVC Plastic Grinding Machine in Action: Video
Watch the high-speed pulverizing process from pellet infeed to calibrated fine powder discharge.
Frequently Asked Questions
Warranty & Global Engineering Support
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12-Month Comprehensive Mechanical Warranty
All primary mechanical assemblies, main rotor bearings, and structural chambers are covered under our 12-month industrial warranty, backed by pre-stocked replacement disc sets and wear components.
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Global Commissioning & Disc Calibration Support
We provide on-site commissioning, electrical integration support, operator blade-gap calibration training, and comprehensive video documentation for routine disc sharpening and maintenance.
Request a Custom FineGrind Pulverizer Quote
Share your raw material polymer (PVC, LLDPE, PP, EVA), feedstock dimensions, target mesh fineness, and required output (kg/h). Rumtoo engineers will recommend an optimized pulverizing line configuration with tailored cyclone collection and air-cooling parameters.
