Equipment
Dust-tight mechanical screw conveyor and auger elevator for horizontal and inclined transfer of plastic pellets, regrind flakes, powders, and mineral fillers.
Reference values for the model or models named above. The confirmed configuration, the capacity basis and the scope of supply are stated in the quotation and the drawings.
Overview
Transfers and elevates bulk plastic pellets, regrind flakes, powders, and mineral fillers between storage, mixing, and processing stations.
The Industrial Screw Conveyor (auger conveyor / screw elevator) provides reliable, dust-tight mechanical transfer and elevation for plastic powders, mineral fillers, polymer pellets, and recycled regrind flakes. Engineered with a heavy-duty continuous helical auger screw housed within a fully enclosed tubular or U-trough casing, it delivers positive-displacement bulk conveyance across horizontal, inclined, and steep-angle configurations between storage silos, bag-dump stations, mixers, and compounding extruder feeding hoppers.
Unlike pneumatic conveying systems that require high-volume compressed air or vacuum blowers and separate dust filtration receivers, screw conveyors provide a compact, low-maintenance mechanical solution that operates without risk of material segregation or filter bag blinding. With variable-frequency drive (VFD) speed regulation, quick-release cleanout hatches, and multiple flight metallurgy options, it ensures consistent, spillage-free transfer across compounding, recycling, and masterbatch processing facilities.
Key features
Each picture names one part of the machine and what it does for the material and the batch.
Precision-formed continuous cold-rolled helical spiral flights welded to a heavy-gauge central mandrel tube. Dynamically balanced to eliminate rotational vibration, providing high-efficiency positive-displacement conveyance without crushing delicate pellets or degrading powder quality.
Fully sealed cylindrical tube or U-trough fabricated with continuous smooth interior welds and silicone/EPDM gasketed flanges. Guarantees 100% dust-tight containment of ultra-fine mineral fillers and micro-pellets, preventing environmental contamination and fugitive dust emissions.
Direct-coupled hollow-shaft helical-bevel gear motor powered via a variable-frequency drive (VFD). Allows stepless conveying speed adjustment to match extruder feed demand or fine-tune batch transfer rates with low electrical power draw.
Outboard flanged pillow block bearings mounted with air-purged stuffing boxes or multi-layer PTFE lip seals. Separates bearing lubrication from the product transfer stream and prevents powder migration into bearing races.
Features a bottom quick-release cleanout slide gate, reverse auger jogging control, and optional hinged U-trough inspection covers. Enables full trough cleanout and zero cross-batch contamination during rapid color or polymer changes.
Material and process
Read the conditions together: a machine is selected for the material and the output, not from its name alone.
Optimized for mechanical transfer and elevation of free-flowing and semi-free-flowing polymer pellets, regrind flakes, masterbatches, and dry powder additives (calcium carbonate, talc, titanium dioxide, flame retardants, stabilizers). Compatible with virgin and recycled resin streams including PP, PE, HDPE, LDPE, ABS, PS, PC, PET, and PVC dry-blends.
Particularly suitable for short-to-medium distance straight-line conveying (horizontal up to 12 meters, or inclined angles up to 45°–60°). Extensively utilized to transfer mixed batches from ribbon blenders or vertical mixers into extruder feed hoppers, or elevate bulk materials from floor-level bag dump stations to storage silos.
Mechanical bulk transfer auger; key engineering boundaries include:
Accepts free-flowing and semi-free-flowing bulk solids, including virgin polymer pellets, regrind flakes, powder additives, and mineral fillers (calcium carbonate, talc, titanium dioxide, flame retardants, zinc stearate). Bulk density typically ranges from 0.25 kg/L to 1.8 kg/L.
Infeed must be free of metallic tramp contamination, uncrushed solid purge lumps, or tramp wire that could jam between the auger flights and the casing wall. For cohesive powders prone to rat-holing, the conveyor charging hopper should be equipped with an integrated bridge-breaker agitator or pneumatic vibrator.
Delivers a continuous, pulse-minimized stream of bulk material directly into secondary processing targets, including compounding extruder feed hoppers, loss-in-weight feeder bins, vertical/horizontal mixers, packaging silos, or big-bag filling stations.
Discharge velocity is smoothly regulated via VFD drive; minimal material holdup remains in the casing when operated in reverse purge mode at batch termination.
Throughput
Read a figure together with the basis below it: the same machine reaches different numbers on different materials.
1.5–10 Ton/Hour
Throughput ratings represent continuous mechanical volumetric delivery (typically 0.5 m³/h to 25 m³/h, scaling to approx. 300 kg/h up to 15,000 kg/h depending on bulk density). Ratings are established under steady charging conditions with a nominal 45% trough/tube loading fill ratio. Incline angles reduce conveying efficiency: horizontal conveyance operates at 100% baseline capacity, while a 30° incline delivers approximately 70%–75% efficiency, and a 45° incline delivers approximately 55%–60% efficiency due to gravity fallback.
Models
The figures are the reference values entered for each model. The model for your line is confirmed against your material and output before it is quoted.
Scroll the table sideways to read every column →
| Model | Capacity range | Rated power | Dimensions | Hopper Capacity | Conveyor Speed | Conveying height / distance (customizable) |
|---|---|---|---|---|---|---|
| NC-LX100 | 1.5-2.5 Ton/Hour | 1.5 kW | Ø133mm | 50L | 0.5m/s | 2m/1.2m |
| NC-LX150 | 2.5-4 Ton/Hour | 2.2 kW | Ø159mm | 50L | 0.5m/s | 2m/1.2m |
| NC-LX200 | 5-7 Ton/Hour | 3 kW | Ø219 | 80L | 0.5m/s | 2m/1.2m |
| NC-LX300 | 7-10 Ton/Hour | 5.5 kW | Ø325mm | 100L | 0.5m/s | 2m/1.2m |
Scope of supply
The quotation states the scope for the confirmed configuration; the groups below describe how a supply is normally split.
Installation planning
These are the connections the machine and the line around it have to agree on before the layout is fixed.
Mechanical: Standard round or square flanged top charging inlet (DN150–DN300) and bottom discharge spout (DN150–DN250). Flexible anti-static silicone or polyurethane bellow sleeves recommended at the discharge interface to isolate mechanical vibration from gravimetric feeders or extruder throats.
Electrical & Automation: Three-phase industrial power connection to the IP54/IP55 control panel. Terminal block provides dry contacts for Run/Fault status, remote Start/Stop interlock from downstream level sensors (rotary paddle or tuning fork level switches), and optional 4–20 mA / Modbus RTU speed reference from extruder control systems.
The buyer is responsible for preparing a level, structurally sound floor or mezzanine platform capable of supporting the static and dynamic operating weight of the conveyor and charging hopper. Customer provides main power cabling to the control inverter cabinet, coordinates structural overhead hanging brackets if suspending long conveyor tubes, and ensures flexible bellow connections between the conveyor discharge port and downstream equipment to prevent vibration transfer.
Spare parts
The parts that wear in normal service, and the spares worth keeping on site. How often a part is replaced depends on the material and the duty the machine runs, so the basis is confirmed for each machine.
Inspect monthly for powder weepage; tighten seal follower or replace packing rings during scheduled line maintenance or color changeover.
Located at shaft penetrations on the inlet and discharge endplates. Prevents fine powder and dust from escaping and protects outer bearing pedestals. Keep two sets in reserve.
Inspect monthly; replace upon visible elastomer spider cracking, deformation, or belt wear/fraying.
Connects gear motor output shaft to conveyor drive shaft, absorbing rotational shock loads during loaded starts.
Inspect wear clearance every 6 months; replace bronze or UHMWPE bushing when radial clearance exceeds 3 mm to prevent flight-to-casing rub.
Used only on sectional conveyors exceeding 6 meters in total length to prevent center shaft deflection. Standard short conveyors operate without internal hanger bearings.
Inspect during each cleanout; replace if gasket is torn, compressed, or exhibiting dust leakage.
Gasket seals fitted along the bottom cleanout gate and top inspection covers to preserve dust-tight integrity.
Inspect during quarterly PM; replace if abnormal temperature rise, seal failure, or shaft runout is observed (typical replacement interval: 12,000–16,000 operating hours).
Supports the tail end of the auger screw mandrel. Sits in an outboard bracket isolated from product contact. Specify shaft diameter and conveyor serial number when re-ordering.
Blades, screens and other normal consumables are outside the standard warranty. How a spare part is identified and ordered is set out under Warranty & Spare Parts.
Selection
Work through what you already know. The rest is settled in the conversation, not before the first message.
Follow these engineering guidelines when selecting and sizing an industrial screw conveyor:
Request a Quote A model name, a material or a drawing is enough to start.
Tell us the material, the process and what you need to achieve. Technical details can be completed later together with our sales team.
