Equipment
Industrial linear vibrating screen for plastic pelletizing lines, delivering continuous multi-fraction classification to scalp out agglomerates and eliminate fines and dust.
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
Performs continuous post-pelletizing size classification to scalp out agglomerates and long pellets while eliminating fines and dust from polymer pellet streams.
The Linear Vibrating Screen (also known as a Linear Pellet Screener, Rectangular Vibratory Grader, or Pellet Classifier) is a high-efficiency size-classification and separation system designed for plastics pelletizing lines, masterbatch compounding plants, and polymer recycling facilities. Positioned directly downstream of centrifugal dryers, water-ring dewatering units, or strand pelletizers, the screener performs continuous inline classification: reliably scalping out oversized agglomerates and stringers, isolating off-spec fines and cutting dust, and delivering clean, precisely graded on-spec pellets to downstream storage, air cooling, or packaging stations.
The machine is powered by dual synchronous contra-rotating vibration motors mounted at a precision inclination angle. As the two motors rotate synchronously in opposite directions, their eccentric centrifugal force components cancel each other out in the lateral direction while compounding along the longitudinal axis. This creates a powerful linear trajectory that fluidizes the polymer pellet bed, throwing particles upward and forward in a smooth, continuous conveying wave across the inclined screen deck.
Depending on production cleanliness criteria and quality specifications, linear vibrating screens are configured with single-deck (two fractions) or double-deck (three fractions) separation layouts:
The upper screen deck utilizes heavy-gauge SUS304 perforated punch plates or coarse mesh (typically 4.0 mm to 6.0 mm apertures). As bulk pellets flow over the deck, oversized agglomerates, doublets (twin pellets formed by strand contact in cooling troughs), polymer strings, and start-up clumps are prevented from falling through. These rejected lumps are continuously conveyed forward and discharged through the top oversize chute for offline granulating or reprocessing, protecting downstream molding machinery from nozzle blockages.
On double-deck configurations, material that passes through the top screen lands onto a high-precision lower screen cloth (typically 1.5 mm to 2.0 mm apertures). Standard calibrated pellets cannot pass through this lower mesh and travel across the deck to discharge through the central on-spec product chute. Meanwhile, broken pellet fragments, tails, cutting dust, and abrasive fines fall through into the bottom collection pan and discharge via the undersize chute, ensuring that finished pellets are 100% dust-free and uniform in bulk density.
Key features
Each picture names one part of the machine and what it does for the material and the batch.
Dual synchronous contra-rotating vibration motors mounted at a precision thrust angle (typically 30° to 45°). Centrifugal forces cancel out in the transverse direction while generating a uniform, high-efficiency linear throw that conveys pellets smoothly down the inclined deck while fluidizing the bed.
Multi-tier screen deck layout supporting 1, 2, or 3 classification levels. Simultaneously scalps out merged lumps, long tails, and agglomerates on the upper deck while passing fine chips, broken corners, and dust through the lower deck, discharging perfectly uniform on-spec pellets from the middle chute.
Heavy-duty coil compression springs or composite elastomer rubber dampeners isolate up to 95%–98% of dynamic vibration forces from transmitting into the support structure, floor, or adjacent processing machinery.
Fully enclosed dust cover equipped with quick-release inspection viewports and soft silicone perimeter sealing gaskets. Positively prevents airborne plastic dust and static fines from escaping into the workshop while maintaining a clean, quiet processing environment.
Material and process
Read the conditions together: a machine is selected for the material and the output, not from its name alone.
Engineered for continuous post-pelletizing size classification, scalping, dedusting, and quality grading across plastics compounding, masterbatch manufacturing, and polymer recycling lines.
Ideally suited for handling diverse polymer pellet geometries (cylindrical strand-cut, spherical underwater hot-cut, or water-ring die-face pellets) across all major resin families:
Mechanical size-classification screen; operational boundaries include:
Accepts continuous gravity or chute feed of polymer pellets, masterbatch granules, and recycling regrind directly following post-pelletizing dewatering, centrifugal drying, or cooling water ring troughs:
Discharges continuously separated, clean, and precisely classified material streams through isolated discharge chutes:
Throughput
Read a figure together with the basis below it: the same machine reaches different numbers on different materials.
300–2500 kg/h
Throughput capacity is calculated based on continuous post-pelletizing linear classification of standard solid polymer pellets (cylindrical or spherical, bulk density 0.50–0.65 kg/L) through 1-deck or 2-deck screen configurations with standard screen meshes (top deck 4.0–5.0 mm for agglomerate scalping, bottom deck 1.5–2.0 mm for fines removal):
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.
Classifies the ABS pellets after pelletizing: oversize is scalped out and cutting dust and fines are taken out of the pellet flow before the elevator and the bagging station. Supplied with the line's other back-end auxiliaries — pelletizer, spiral cooling elevator, vertical silo mixer and automatic weighing and packaging station.
Scroll the table sideways to read every column →
| Model | Rated power | Dimensions | Frequency (times/min) | Layers(customizable) |
|---|---|---|---|---|
| NC-ZDS525 | 0.75 kW | 0.5×2.5m | 960(times/min) | 1-7 |
| NC-ZDS530 | 1.1 kW | 0.5×3m | 960(times/min) | 1-7 |
| NC-ZDS1020 | 1.5 kW | 1×2m | 960(times/min) | 1-7 |
| NC-ZDS1030 | 2.2 kW | 1×3m | 960(times/min) | 1-7 |
| NC-ZDS1230 | 2.2 kW | 1.2×3m | 960(times/min) | 1-7 |
| NC-ZDS1235 | 3 kW | 1.2×3.5m | 960(times/min) | 1-7 |
| NC-ZDS1530 | 2.4 kW | 1.5×3m | 960(times/min) | 1-7 |
| NC-ZDS1540 | 4.4 kW | 1.5×4m | 960(times/min) | 1-7 |
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: Bolted base frame mounting onto level concrete floor or elevated steel mezzanine; standard round flanged or spigot inlet (DN150–DN300) with flexible anti-vibration silicone connection sleeve; multiple dedicated discharge spigots (DN100–DN200) for on-spec, oversize, and fines fractions.
Electrical & Control: Three-phase industrial power supply to local motor starter panel; auxiliary control interlock terminals providing dry contacts for screener Run/Stop status and upstream pelletizer interlock protection.
Dedusting / Aspiration (Optional): Top dust cover flange (DN100–DN150) for connection to central plant negative-pressure dust extraction or secondary fines cyclone.
The buyer provides a rigid, level concrete foundation floor or structural mezzanine steel platform engineered to support the machine’s static weight and isolate low-frequency harmonic vibrations; electrical main supply routed to the local motor starter / control isolator; flexible dust-tight connection sleeves (silicone or food-grade rubber) matched to upstream chutes and downstream collection hoppers; and regular collection or return systems for separated oversize lumps and undersize fines.
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 weekly for mesh tearing, distortion, or localized wear; replace immediately if mesh apertures enlarge or perforation bridges fracture.
Screen media mounted inside the clamping frames. Primary consumable component. Keep one complete replacement set per mesh size on site.
Inspect quarterly for spring fatigue, permanent settling, micro-cracks, or uneven compression height (> 5 mm variance across corners); replace in full sets.
Suspension dampeners isolating dynamic vibration forces between the vibrating screen body and stationary base frame.
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.
Proper sizing and configuration of a linear vibrating screen depends on volumetric throughput, pellet geometry, polymer surface tackiness, and required classification fractions:
Request a Quote A model name, a material or a drawing is enough to start.
Photos and videos
Tell us the material, the process and what you need to achieve. Technical details can be completed later together with our sales team.
