LDPE HDPE PE LLDPE Rotomoulding Plastic Pulverizing Machine Technical Features:

• Multi-unit parallel system for 2,000–3,000 kg/h — two or more PNMF units share a common vacuum feeding network, central powder collection bin, and single HMI control station. One operator monitors the full system; individual unit faults do not halt other machines.
• Centralised vacuum feeding and powder collection — raw material is conveyed automatically to each disc inlet; finished powder is collected by vacuum to a central bin that can be located in a separate room, keeping the grinding floor clean and operator exposure to dust minimal.
• HMI touchscreen with one-button start — single interface manages all pulveriser units, vacuum conveyors, and dust collection. Fault alarm with error code display; remote PC monitoring available.
• Feeding, grinding, and collection system separation — three subsystems are physically isolated; finished powder does not contact raw material infeed, reducing cross-contamination risk in multi-grade production environments.
• Centrifugal disc mechanism for narrow particle size distribution — produces tighter mesh distribution than blade-type machines at equivalent throughput; critical for rotomoulding powder where out-of-spec particles cause moulding defects.
• Expandable configuration — additional PNMF units can be added to existing vacuum and collection infrastructure as production volume grows.

LDPE HDPE PE LLDPE Rotomoulding Plastic Pulverizing Machine Description:

The PNMF series rotomoulding plastic pulverizer is the standard machine for producing LLDPE, LDPE, and HDPE powder to rotomoulding specification. Rotomoulding is the most powder-specification-sensitive plastic processing method: the powder must flow freely inside a rotating mould at elevated temperature and coat the mould surface evenly before fusing. This requires tighter particle size control than compounding or recycling applications.

The standard rotomoulding powder specification is 35 mesh (approximately D50 500 µm) with a narrow particle size distribution. Powder that is too coarse leaves uncoated areas on the mould wall; powder that is too fine tends to clump and bridge in the mould, causing surface defects. The PNMF centrifugal disc mechanism — where material passes through an adjustable grinding gap under centrifugal force — produces a narrower particle size distribution than turbo-blade pulverisers for the same target mesh, making it the preferred mechanism for rotomoulding powder production.

For production-scale rotomoulding operations, a multi-unit parallel system (two or more PNMF-800 units with shared vacuum feeding, central powder collection, and HMI control) achieves 2,000–3,000 kg/h total output. A single PNMF-800 delivers 400–800 kg/h.

LDPE HDPE PE LLDPE Rotomoulding Plastic Pulverizing Machine Components:

Vibratory Feeding Magnetic vibratory feeder meters PE/LLDPE/HDPE granules into the disc centre at a consistent rate. Built-in magnetic element captures metal fragments before they reach the grinding surfaces — contamination control is critical for rotomoulding powder, which is used directly in food-contact and drinking water storage applications.	Pulverizer Disc Centrifugal disc mechanism with adjustable gap. For rotomoulding applications, the gap is set to produce 35 mesh output with narrow particle size distribution. Fixed disc is water-cooled (double-layer cavity); rotating disc uses atomised spray cooling — both run simultaneously to keep PE powder temperature stable during continuous production runs.
Whole Body Pulverizer Blade Standard configuration for PNMF-300 through PNMF-500. Blade tooth geometry is customisable to match LLDPE, LDPE, or HDPE hardness characteristics and target mesh specification.	Segment Pulverizer Blade Available for PNMF-600 and PNMF-800. Resharpenable 4–5 times before replacement. For rotomoulding operations running continuously on the same PE grade, segment blades reduce long-term consumable cost compared to whole-body blade replacement.
Temperature Control Thermostat-controlled solenoid valve pauses material feed if disc temperature exceeds set threshold. For PE and LLDPE — both heat-sensitive materials — maintaining disc temperature within the operating range is essential for consistent powder flowability and particle shape.	Vibrating Screen Real-time classification. For rotomoulding production, the screen is set to 35 mesh (or client-specified target); oversized particles return to the disc automatically. The closed-loop classification is the primary mechanism for achieving the narrow particle size distribution required by rotomoulding specifications.
Bags Type Dust Catcher Standard dust control for smaller PNMF installations (PNMF-300 to PNMF-500). For multi-unit systems at full capacity, pulse dust collector is the recommended specification.	Intelligent Control PLC panel per unit, networked to the central HMI in multi-unit configurations. Individual unit fault halting, error code display, and parameter logging for production quality records.

LDPE HDPE PE LLDPE Rotomoulding Plastic Pulverizing Machine Optional Components:

LDPE HDPE PE LLDPE Rotomoulding Plastic Pulverizing Machine Application Areas:

Primary application: rotomoulding powder production. LLDPE is the most commonly used resin for rotomoulding (water tanks, playground equipment, chemical storage containers, automotive fuel tanks). LDPE is used for softer moulded products; HDPE for higher-rigidity applications. All three require pulverised powder at 35 mesh for standard rotomoulding, with some processes specifying 30 mesh (coarser, faster mould coating) or 40 mesh (finer, better surface finish on complex geometries).

Secondary applications. The PNMF also produces PE, PP, ABS, EVA, PET, and nylon powder for compounding, masterbatch production, hot-melt adhesive, and powder coating applications — all within the 20–120 mesh output range. For recycling applications using PE film agglomerate as input, see the densified agglomerator material pulveriser.

Frequently Asked Questions

What mesh size is required for rotomoulding powder?

The industry standard for rotomoulding powder is 35 mesh (approximately D50 500 µm, with most particles in the 300–700 µm range). Some moulders specify 30 mesh for faster mould coating on large simple shapes, or 40 mesh for finer surface finish on complex geometries. The PNMF disc gap is set to the target specification and can be adjusted during operation — a single machine covers the full range required by most rotomoulding operations.

Why is the PNMF disc mechanism preferred over blade-type pulverisers for rotomoulding powder?

Rotomoulding specifications require not just a target mesh but a narrow particle size distribution — a high proportion of particles close to the target size, with few oversized and few ultrafine particles. Ultrafine particles (below 150 µm) reduce powder flowability in the mould and cause bridging; oversized particles leave uncoated spots. The centrifugal disc mechanism in the PNMF produces a narrower size distribution than turbo-blade designs at equivalent throughput because material passes through a uniform grinding gap rather than a variable shear zone. The closed-loop vibrating screen classification further tightens the distribution by continuously returning out-of-spec particles to the disc.

Can the system process multiple PE grades (LLDPE, LDPE, HDPE) on the same equipment?

Yes — LLDPE, LDPE, and HDPE are all within the PNMF operating range. The disc gap and feed rate are adjusted between grades to account for differences in hardness and heat sensitivity (LDPE is softer and more heat-sensitive than HDPE; LLDPE falls between the two). In multi-grade production environments, the PLC panel supports material-specific operating presets to reduce setup time between grade changeovers. A short purge run between grades is standard practice to prevent cross-contamination of powder batches.

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