LLDPE Pulverizing Machine or Grinding Mill Description:

The PNMF series LLDPE pulverizing machine — also referred to as an LLDPE grinding mill or disc mill — produces LLDPE powder for rotomolding, pipe compound, geomembrane production, and plastic recycling applications. The terms “pulverizing machine,” “grinding mill,” and “disc mill” are used interchangeably in the LLDPE powder industry; they all describe the same centrifugal disc grinding mechanism where LLDPE granules are introduced through the centre of a fixed disc and carried outward through an adjustable grinding gap by centrifugal force.

Selecting the right LLDPE pulverizing machine involves three parameters:

MFI (Melt Flow Index): LLDPE grades for rotomolding typically have MFI of 3–7 g/10min (190°C/2.16 kg). Higher MFI grades flow more easily through the disc gap and produce slightly higher throughput at equivalent mesh settings. Lower MFI grades require slightly reduced feed rate to prevent disc overloading.

Target mesh size: Standard rotomolding powder specification is 35 mesh (approximately D50 500 µm). For LLDPE pipe compound filler or compounding applications, 40–60 mesh is the typical range. The PNMF disc gap is adjusted via feeler gauge to the target setting during operation.

Required capacity: The five PNMF models (PNMF-300 to PNMF-800) cover 30–800 kg/h per unit. For production requirements above 800 kg/h, multi-unit parallel systems are the standard configuration — see the LDPE HDPE PE LLDPE Rotomoulding Pulverizing Machine page for system configurations up to 3,000 kg/h.

Pulverizer Blade:
Our pulverizer blade is made by a professional technical worker. Blade resistance is the small, long service life of the blades between resharpenings.

LLDPE Pulverizing Machine or Grinding Mill Technical Features:

• Disc gap sets output mesh — adjustable during operation — feeler gauge and adjusting bolt set the gap between static and rotating discs; 35 mesh for rotomolding, 40–60 mesh for pipe compound or compounding. No disc removal or machine stoppage required to change mesh target.
• Single drive motor — direct disc connection — no belt transmission between motor and grinding disc; eliminates belt slip losses and belt replacement maintenance. Motor power transfers directly to grinding efficiency at the disc.
• Sealed milling chamber — no dust leakage — the complete milling process from feed inlet to powder discharge is enclosed; LLDPE powder does not leak to the workshop environment during normal operation.
• Dual water-and-air cooling — water-cooled fixed disc cavity and air-cooled rotating disc running simultaneously; maintains stable disc temperature for consistent LLDPE powder quality across multi-shift production runs.
• Automatic feeding, discharging, and sorting — vibrating feeder, grinding disc, vibrating screen, and vacuum powder collection operate as a continuous closed loop without manual intervention between input and output.
• SKF bearings, Siemens motor — standard specification; reduces unplanned downtime in production line environments where the pulverizer is a critical-path machine for pipe or rotomolding production.

LLDPE Pulverizing Machine or Grinding Mill Components:

Vibratory Feeding Magnetic vibratory feeder meters LLDPE granules into the disc centre at a controlled rate; built-in magnet captures ferrous fragments before they reach the grinding surfaces.	Pulverizer Disc Centrifugal disc with adjustable gap (feeler gauge + adjusting bolt); 35 mesh for rotomolding, 40–60 mesh for pipe compound. Fixed disc double-layer water-cooled; rotating disc atomised spray cooled.
Whole Body Pulverizer Blade Standard for PNMF-300 to PNMF-500; customisable tooth geometry for LLDPE MFI range. D2 steel is standard for LLDPE granule processing.	Segment Pulverizer Blade For PNMF-600/800; resharpenable 4–5 times before full replacement — reduces per-tonne blade cost in continuous LLDPE powder production operations.
Temperature Control Thermostat-controlled solenoid valve pauses feed if disc temperature exceeds threshold; protects LLDPE powder quality during extended production runs or when ambient temperature is elevated.	Vibrating Screen Real-time in-line classification; on-spec LLDPE powder discharges continuously, oversized particles return to disc automatically. Screen mesh interchangeable for different target fineness.
Bags Type Dust Catcher Standard dust control; LLDPE powder is a combustible fine dust — ensure workshop grounding and dust containment comply with applicable safety regulations.	Intelligent Control PLC panel with fault detection and error code display; adjustable feed rate and cooling parameters via HMI; MFI-specific operating presets can be saved for facilities processing multiple LLDPE grades.

LLDPE Pulverizing Machine or Grinding Mill Application Areas:

LLDPE pipe manufacturers — in-line scrap recycling. LLDPE pipe extrusion lines generate offcuts, purge material, and rejected pipe sections. A PNMF pulverizing machine positioned in-line or adjacent to the extrusion floor grinds these offcuts to 40–60 mesh powder for direct reintroduction into the pipe compound mix. This is the most common single-unit LLDPE pulverizing application: small PNMF-300 or PNMF-400 units running at 30–120 kg/h, matched to the scrap generation rate of one or two pipe extrusion lines.

Rotomolding powder production. LLDPE granules (MFI 3–7 g/10min) are pulverised to 35 mesh for supply to rotomolding manufacturers producing water tanks, chemical containers, and industrial bins. Single PNMF-800 units (400–800 kg/h) are standard for dedicated powder production; multi-unit systems serve large-scale rotomolding operations.

Geomembrane and agricultural film compound. LLDPE powder at 40–60 mesh is used as a secondary component in geomembrane compound production and as a blend additive in agricultural film formulations. Consistent particle size from the PNMF’s closed-loop vibrating screen classification is important for even dispersion in the mixing stage.

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