1 / 1
MPD Series Vertical Disc Plastic Pulverizer
Low-power-consumption vertical disc pulverizer for PE (LLDPE/LDPE/MDPE/HDPE), PVC (rigid & soft), PP, PS, ABS, Nylon, EVA, PET grinding. Disc diameter 350-800mm, capacity 100-1200 kg/h, output 60-150 mesh.
The MPD Series is a vertical disc plastic pulverizer that grinds crusher regrind and granules down to fine powder. Disc diameter runs from 350 to 800 mm across the range on a 22-110 kW main motor, and plug-bolt adjustment sets fineness between 60 and 150 mesh at 100-1200 kg/h from a feed limited to 10 mm. It is used for PE, rigid and soft PVC, PP, PS, ABS and EVA powder for pipe, profile and masterbatch production, and is also catalogued as a plastic powder mill or disc-type grinding mill.
Technical Specifications
| Model | MPD-350 | MPD-500 | MPD-650 | MPD-800 |
|---|---|---|---|---|
| Main Motor | 22 kW | 45 kW | 75 kW | 110 kW |
| Disc Diameter | 350 mm | 500 mm | 650 mm | 800 mm |
| Feed Size | ≤ 10 mm (crusher regrind or granules) | |||
| Output Fineness | 60-150 mesh (adjustable via plug bolt) | |||
| Capacity | 100-200 kg/h | 200-500 kg/h | 500-800 kg/h | 800-1200 kg/h |
| Disc Type | New-generation high-resistance disc (2x service life of standard discs) | |||
| Cooling System | Water + air dual cooling on main machine | |||
| Dust Control | Fully sealed milling, cyclone + dust collector, zero dust leakage | |||
| Applicable Materials | LDPE, HDPE, MDPE, LLDPE, rigid & soft PVC, PP, PS, ABS, Nylon, EVA, PET, PC | |||
| Automation | Auto feeding, auto material sorting, optional continuous production package | |||
MPD Series Vertical Disc Plastic Pulverizer
The MPD series is a new-generation vertical disc pulverizer engineered for low power consumption and high-quality powder output. It is designed primarily for grinding polyethylene (PE — including LLDPE, LDPE, MDPE, HDPE), polyvinyl chloride (PVC — both rigid and soft), polypropylene (PP), polystyrene (PS), ABS, Nylon, EVA and PET. By using this pulverizer, manufacturers can reduce production cost, perform material modification and improve end-product quality.
The complete pulverizing system consists of an independent control cabinet, pulverizer main machine, cyclone separator, airlock, vibrating screen, induced draft fan, dust collector, hopper and piping.
Key Features
- New disc design — high-resistance alloy disc with 2× the service life of standard discs, lowering long-term operating cost.
- High-speed precision bearing — purpose-built bearing reaches high rotational speed with a single drive motor, ensuring efficient grinding impact while saving mechanical and control engineering time.
- Easy maintenance — open the door cover for fast cleaning and inspection.
- Fully sealed milling — no dust leakage throughout the grinding process, environmentally compliant.
- Fully automatic operation — automatic feeding and material sorting, optional continuous production package.
- Simple gap adjustment — grinding clearance is adjusted and fine-tuned (60-150 mesh) using plug foot bolts, no special tools required.
- Water + air dual cooling — the optimized grinding chamber has a minimal cross-section with an almost flat vertical grinding surface. Material is captured, sheared and rapidly conveyed through the grinding chamber, eliminating material surging and preventing thermal decomposition, which increases throughput.
Wide Application Range
- Multi-functional hopper design for both feed inlet and discharge outlet
- Good powder flowability, easy to blend with other powders
- Optional modules for fully automatic continuous production
Processing Materials
PE (LLDPE / LDPE / MDPE / HDPE) regrind and film granules, rigid & soft PVC pipe / profile / compound, PP granules and regrind, PS scrap, ABS regrind, Nylon, EVA, PET bottle flake, PC scrap.
Typical Applications
- Rotational molding powder production (LLDPE / HDPE)
- PVC pipe, profile and skirting powder recycling
- Masterbatch and compound manufacturing
- WPC / SPC flooring powder preparation
- Powder coating and surface modification
- In-house recycling of injection and extrusion waste
Why Choose Zhiyi Machine
- 15+ years of engineering experience in plastic size reduction equipment
- CE certified, ISO 9001 quality management system
- Pre-shipment full-load testing on every machine
- Global after-sales support and spare parts supply
- 100+ countries and regions served worldwide
Feed Requirements
The MPD is a finishing machine, and it is specific about what it will accept: 10 mm and below, as crusher regrind or granules. Feed it shredder flake and the disc will be overloaded and the powder will be coarse and inconsistent. In a standard line this means the regrind comes from a granulator, which in turn is fed by a shredder.
Material coverage is wide — LDPE, HDPE, MDPE, LLDPE, rigid and soft PVC, PP, PS, ABS, Nylon, EVA, PET and PC — so the same machine can serve rotomoulding powder one day and PVC compounding the next.
Fineness and Cooling
Output runs 60–150 mesh, adjusted with the plug bolt. Finer settings reduce throughput, and the relationship is not linear — the last increment of fineness costs more rate than the first.
Heat is the limiting factor in any plastic grinding. The MPD uses combined water and air cooling on the main machine, which is what allows it to hold a consistent grind on PE without the material softening and smearing on the disc. Milling is fully sealed, with a cyclone and dust collector, so dust does not escape into the plant — a point that matters as much for operator health as for housekeeping.
Selecting a Model
Capacity runs from 100–200 kg/h on the MPD-350 to 800–1,200 kg/h on the MPD-800, with main motors from 22 kW to 110 kW and disc diameters from 350 to 800 mm. Published capacity assumes a mid-range fineness; specify your target mesh when sizing, because the same machine rated at 60 mesh will not deliver the same figure at 150.
Optional automation — auto feeding, auto material sorting and a continuous production package — is worth considering at the larger sizes, where manual feeding becomes the bottleneck rather than the mill.
Operating Notes
The disc is the consumable. The MPD uses a high-resistance disc design intended to last roughly twice as long as a standard disc, but the interval still depends on the material: mineral-filled PVC compounds are considerably more abrasive than virgin PE regrind.
Because output fineness is set mechanically, small adjustments to the plug bolt are the first thing to check when powder quality drifts. Blaming the disc before checking the setting is a common and expensive mistake.
Related Reading
Frequently Asked Questions
10 mm and below — crusher regrind or granules. It is a finishing mill, not a primary grinder. Material straight from a shredder is far too coarse; the usual line is shredder, then granulator, then pulverizer.
60–150 mesh, adjusted mechanically with the plug bolt. Higher fineness reduces throughput, and the rate falls faster as you approach the fine end of the range.
LDPE, HDPE, MDPE, LLDPE, rigid and soft PVC, PP, PS, ABS, Nylon, EVA, PET and PC. Rotational moulding powder and PVC compounding are the two most common applications.
With combined water and air cooling on the main machine. Heat is the main constraint in plastic grinding — once the material softens it smears on the disc instead of cutting, and powder quality collapses. Cooling is what lets the mill hold a consistent grind on PE.
Yes. Milling is fully sealed and the system includes a cyclone and dust collector, so there is no dust leakage into the plant.
Material abrasiveness, primarily. Virgin PE regrind is mild; mineral-filled PVC compounds are not. The MPD uses a high-resistance disc design rated at roughly twice the service life of a standard disc, but no hour figure is meaningful without knowing the feedstock.
Related Products
Interested in This Machine?
Tell us your material type, desired throughput, and output size — our team will provide a tailored recommendation and quotation.