HDPE/PP rigid plastic pelletizing line.
Single-stage and two-stage models.
A separate rigid plastic pelletizing line for washed HDPE/PP flakes, crates, drums, containers and selected hard scrap. Select single-stage or two-stage extrusion by contamination and pellet quality.
A rigid pelletizer must be matched to the contamination and odour level, not only the output.
Washed rigid flake can still carry residual contamination, moisture and odour. A single-stage extruder may be sufficient for clean regrind, while a two-stage system adds filtration, venting and process stability for more difficult feed.
BENK-PRL-RGD offers both architectures across multiple capacities. The washing line is selected separately; the pelletizer is then sized from flake bulk density, moisture, contamination and target pellet quality.
Clean regrind and flake
A single-screw extruder with filtration and degassing for stable rigid-plastic duties.
Difficult or high-odour feed
Two-stage plasticizing, dual filtration and vacuum degassing improve pellet purity.
Hydraulic screen changing
Continuous filtration protects the die and reduces downtime.
Moisture and volatile removal
Vacuum venting improves pellet density and reduces bubbles and odour.
Water-ring or strand
Cutting options are matched to the polymer and target pellet shape.
Six capacity points
100, 200, 300, 500, 700 and 1,000 kg/h reference models cover different rigid recovery projects.
Melt, filter and degas the washed rigid flake.
The pelletizing line is a separate stage after washing. Its configuration changes with contamination, moisture and required pellet quality.
Flake buffer
Receive washed rigid flake and control feed rate.
Feeding
Meter flake into the extruder with a screw or force feeder.
Plasticizing
Melt and homogenize the rigid flake.
Filtration
Remove residual contamination with a screen changer.
Vacuum degassing
Remove moisture, air and volatiles.
Cutting
Cut pellets by water-ring or strand system.
Dewater & screen
Cool, dewater and classify the pellets.
Packing
Convey pellets to storage or bagging.
Single-stage and two-stage model ranges.
The same output target may be served by a single-stage or two-stage model. The final decision depends on contamination, odour and pellet quality.
| Model | Output | Main motor | L/D | Stage | Typical use |
|---|---|---|---|---|---|
| BENK-PRL-RGD-0100 | 100–200 kg/h | ≈75 kW | 33:1 | Single | Clean regrind |
| BENK-PRL-RGD-0200 | 150–280 kg/h | ≈90 kW | 33:1 | Single | Washed flakes |
| BENK-PRL-RGD-0300 | 300–450 kg/h | ≈132 kW | 31:1 | Single | Mixed rigid flake |
| BENK-PRL-RGD-0500 | 500–600 kg/h | ≈185 kW | 31:1 | Single | Industrial recovery |
| BENK-PRL-RGD-0700 | 700–900 kg/h | ≈250 kW | 31:1 | Single | High-output flake |
| BENK-PRL-RGD-1000 | 800–1,000 kg/h | ≈315 kW | 31:1 | Single / two-stage | Large rigid recovery |
For a 500–700 kg/h rigid pelletizing target, compare BENK-PRL-RGD-0500 and -0700. If the feed carries heavy contamination or odour, review the two-stage equivalent.
Purity and density come from filtration and degassing.
Two-stage extrusion can improve pellet purity and consistency when the washed flake is mixed, odorous or difficult to process.
Rigid pelletizing detail.
The pelletizing module can be supplied after a separate washing line or as part of a matched turnkey project.
Rigid pellets for demanding downstream uses.
The final application decides the filtration, degassing and pellet shape required.
HDPE pipe compounds
Injection-moulded articles
Crates and industrial containers
Rigid sheet and board
Recycled-content compounds
Dense pellets for transport
Choose the extrusion architecture before the motor.
Single-stage and two-stage systems can both be correct; the feed condition determines which one is justified.
The pelletizer is only as good as the washed rigid flake.
Compare five HDPE/PP rigid washing models from 500 to 4,000 kg/h and match the upstream flake specification.
One engineering team from material review to stable production.
BENK engineers and manufactures plastic extrusion, washing and pelletizing equipment in Zhangjiagang, China. The recycling team works from a material sample and target output through layout, machine selection, factory testing, installation and operator training.
Long-running engineering and manufacturing experience in plastic extrusion and recycling equipment.
Washing stages, drying method and pelletizing configuration are selected from the actual feed and contamination profile.
Line sections are assembled and trial run before shipment, with output and operating records for the agreed test material.
Process design, plant layout, utilities, installation, commissioning and training can sit under one project team.
Quality-controlled fabrication and assembly with CE-compliant electrical and safety components.
Remote diagnostics, spare parts and process optimization support for the operating life of the line.
Build the right process around the line.
Compare the complementary washing or pelletizing stage, or read the full selection guide before requesting a quotation.
Useful reading before you compare plastic recycling line prices.
These practical guides explain how capacity, contamination, drying and pellet quality decide the real cost and return of a washing or pelletizing line.
How to choose the right washing line capacity
Why nominal kg/h is not enough, and how to size washing, drying and pelletizing as one mass balance.
Read the guide → PET recyclingPET bottle to rPET pellets: the complete route
From bale opening and hot washing to filtration, vacuum degassing, pelletizing and optional SSP.
Explore PET processing → Film & rigidWhy drying determines pellet quality
How moisture, bulk density and contamination change the choice between film and rigid pelletizing systems.
Compare line options →Send the material and capacity target. BENK will map the closest washing and pelletizing models before you request a formal quotation.
HDPE/PP rigid pelletizing line questions.
A washed flake sample and a clear pellet application are the most useful starting points.
When do I need a two-stage pelletizer?
Two-stage extrusion is considered for mixed or heavily contaminated rigid flake, high odour, high moisture or applications requiring extra filtration and degassing.
Which model is right for 700 kg/h?
BENK-PRL-RGD-0700 is the single-stage reference model. If the feed is difficult, compare the two-stage configuration at the same output.
Can the line process HDPE and PP together?
Yes, within a defined polymer mix. The screw, filtration and product acceptance criteria should be confirmed with a sample and target application.
How is the pelletizing line matched to the washing line?
The washed flake output, bulk density, moisture and contamination are used to select the pelletizer. The washing line nameplate alone is not enough.
Can I buy the pelletizing line separately?
Yes. The rigid pelletizing line is a separate product family and can be fed by existing washed flake.
Get a recommended model, budget range and delivery estimate.
Give BENK the material, contamination level, target output and end product. Our engineers will review the duty and reply with a sized washing or pelletizing line — not a generic catalogue answer.