Plastics & polymers,
handled with precision.
Robust stainless steel conveying systems for the plastics and polymer sector — from pellet feeding and powder handling through masterbatch dosing and recycled regrind.
Dust-free, wear-resistant — built for polymer duty.
At Stellex, we engineer robust stainless steel screw conveyors for the plastics and polymer sector — ensuring efficient, dust-tight handling of plastic pellets, resins, powders, masterbatch and recycled flakes. Our solutions maintain material quality, avoid contamination and optimise productivity for extrusion, compounding, injection moulding, and recycling lines.
Every system is custom-designed for your material, process conditions and line layout — fully documented and backed by a complete spares catalogue.
Six trust markers.
What plastics and polymer processors rely on us for — on every project, from quotation through commissioning.
Wear-resistant designs
Anti-wear flights and robust construction for abrasive pellets, regrind and recycled flakes.
Dust-free, enclosed handling
Fully enclosed conveyors with sealed bearings and easy-clean covers minimise dust escape and contamination.
Temperature control
Jacketed conveyor options and temperature-controlled flights for sensitive polymer resins and masterbatch.
Custom-built
Screw geometry, pitch and surface finish chosen for your material — pellets, powders, or regrind.
Fast changeovers
Quick-disassembly panels and polished internals for rapid grade or color changeovers with zero carryover.
Process-optimised automation
VFD control for precise dosing, plus PLC-compatible designs for automated extrusion and compounding lines.
Three categories. One discipline.
From pellet feeding to recycled regrind — the same engineering standard across every plastics application.
Pellet & resin transfer
- Gentle, enclosed transfer to prevent breakage and contamination
- Anti-wear flights and variable pitch for pellet integrity
- Silo-to-process conveyance for extrusion and injection lines
Powder handling & dosing
- Dust-tight conveying of polymer powders to mixers and hoppers
- Sealed bearings and quick-disassembly covers for fast changeover
- Precise loss-in-weight feeding for compounding lines
Recycling & regrind
- Robust, wear-resistant screws for abrasive recycled flakes
- Enclosed transfer from shredders to reprocessing lines
- Designed to minimise dust and ensure plant safety
Four sub-sectors. Explore the detail.
From pellet feeding and powder handling to masterbatch and regrind — click any sector for applications, features and materials handled.
Gentle, enclosed transfer of plastic pellets and resins to extrusion lines — preventing breakage and contamination with anti-wear flights and variable pitch.
- Pellet and resin transfer from silo to extrusion or injection line
- Gentle conveying to protect pellet integrity and reduce fines
- Accurate, variable-speed dosing into hoppers and dryers
- Anti-wear flights for long service life
- Variable-pitch screw to maintain pellet quality
- Sealed, dust-tight enclosure
- VFD control for accurate throughput
Plastic pellets, virgin resins, engineering polymers (ABS, PP, PE, PET, Nylon)
Precise, dust-tight conveying of polymer powders to mixers and hoppers — with sealed bearings and quick-disassembly covers for cleanliness and fast changeovers.
- Polymer powder transfer to mixers, extruders and blenders
- Precise loss-in-weight feeding for compounding lines
- Dust-tight conveying to reduce contamination and spillage
- Fully enclosed, sealed design for dust containment
- Quick-disassembly covers for rapid cleaning
- Anti-static options for combustible powders
- Accurate variable-speed feeding
PVC powder, PTFE, polymer powders, filler compounds, colour concentrates
Accurate, contamination-free transfer of masterbatch pellets and colour additives — SS 316 builds and rapid cleanout for zero carryover between grade or colour changes.
- Transfer of masterbatch pellets and colour additives to blending lines
- Precise dosing into extrusion or injection moulding feeds
- Fast cleanout for grade or colour changeovers
- Polished SS 316 internals to prevent cross-contamination
- Rapid cleanout design for zero carryover
- Contamination-free, fully enclosed conveyance
- Compatible with gravimetric dosing systems
Masterbatch pellets, colour concentrates, UV stabilisers, flame retardants, additives
Robust, wear-resistant screws for transferring abrasive recycled flakes, granules and regrind from shredders to reprocessing lines — designed to minimise dust and ensure plant safety.
- Regrind and recycled flake transfer from shredder to extruder
- Granule conveyance in recycling and reprocessing lines
- Abrasive material handling with minimal dust generation
- Hardened or hardfaced flights for abrasive regrind
- Fully enclosed, dust-tight construction
- Wear-resistant liners for extended service life
- Robust drive and bearing specification for heavy-duty duty
Recycled PET flakes, HDPE regrind, mixed polymer granules, recycled PP
5+ materials. handled efficiently.
A short list — we also build for materials not shown here. Tell us what you're handling.
- 01Plastic Pellets
- 02Polymer Powders
- 03Resins
- 04Masterbatch
- 05Recycled Flakes
Common questions.
Straight answers.
Pellet handling, masterbatch dosing and anti-static design — questions plastics process engineers ask us most.
Q/01How do Stellex conveyors handle plastic pellets without degradation?
Pellets are conveyed at low rotational speeds in oversized U-trough or tubular screws to keep shear forces low. Smooth-bore housings, polished flights and gentle inlet geometry prevent angel-hair and fines generation.
Q/02Can you dose masterbatch into an extrusion line?
Yes. Stellex volumetric and gravimetric dosing feeders meter masterbatch, colour and additive pellets into extruder throats and compounding lines, with feed-rate control matched to the host line's screw speed.
Q/03How is regrind (recycled flake) handled?
Regrind tends to be inconsistent in bulk density and prone to bridging. We use vibratory or live-bottom hoppers paired with shaftless or large-pitch screw conveyors to ensure reliable flow into the compounding line.
Q/04Do you build anti-static / explosion-safe conveying for fine polymer powders?
Fine polymer powders can be combustible. We supply earthed, bonded, dust-tight enclosures with anti-static filter media on the dust collector and ATEX-rated motors and instruments where the zone classification demands it.
Q/05What throughput ranges do plastics-industry systems cover?
Stellex sizes plastics conveying from precision additive dosing in the low kg/hr range up to multi-tonne/hr bulk transfer for compounding and masterbatch facilities, matched to the host line's demand.