Twin screw · two-stage · triple screw · pelletizing
Your material, our line: compounding and pelletizing from 1 to 4,000 kg/h
Kerke is a twin screw extruder manufacturer in Nanjing, building co-rotating twin screw extruders, two-stage lines and pelletizing systems for masterbatch, engineering plastics, cable compound, recycling and food — and proving the output on your own material before you order.
Applications first
Start from the material you sell, not from the machine
Ten material groups, 32 application lines. Each page carries the loading ceiling, the parameter table, the process, the equipment and the mistakes that cost the most.
Plastic Masterbatch
Filler, colour, black, white, talc and functional masterbatch lines — the highest-volume application group, and the one where the filler percentage de…
Plastic Modification
Filled, reinforced, toughened, grafted and reactive systems. Side feeding, liquid injection and devolatilization are what separate these lines from a …
Engineering Plastics
PA, PC, PBT, ABS, alloys and glass-fibre reinforcement — drying discipline and fibre protection decide the result.…
Cable Compound
PVC, XLPE and HFFR / LSZH compounds. Heat sensitivity plus water sensitivity rules out most standard pelletizing answers.…
Biodegradable & PLA
PLA, PBAT and starch blends — a 30 °C processing window and a hard moisture ceiling.…
Thermoplastic Elastomer
TPE, TPU, TPR from 30A to 90A: oil dosing, underwater cutting and hardness control.…
Specialty & Low-Temperature
EPP base resin, WPC, powder coating and hot melt — processes that run cold, wet or highly filled.…
Recycling & PET
Film, bottle flakes and regrind. The largest customer group we serve, and the one where feeding decides output.…
Long Fiber & Composites
LFT-G impregnation, 20–60% glass, pellet length 10–25 mm.…
Food & Plant Protein
Puffed snacks and textured vegetable protein on the same twin screw platform, with food-grade documentation.…
Then the machine
Sized by torque, not by tonnage
The same screw diameter can carry 78% more torque. That difference decides whether a line holds 88% filler or stalls at 84%.
| Family | Range | Scope | Key column |
|---|---|---|---|
| Co-rotating twin screw KTE | 15 models | 80–4,000 kg/h, B and D Gearboxes | Output (kg/h) |
| Two-stage KTE/SE | 4 models | Stable Output at 85–90% Filling | Typical product |
| Triple screw KTE-T | 4 models | Better Dispersion in a Shorter L/D | Note |
| Kneader compounding extruder | 3 models | Kneader + Single Screw, 100–1,200 kg/h | Typical product |
| Single screw SE | 8 models | 100–2,000 kg/h, Lowest Cost per kg | Output (kg/h) |
| Lab & pilot twin screw | 6 models | 1–150 kg/h Trial & Small Batch | Output (kg/h) |
| Pelletizing systems | 7 models | Water Ring · Strand · Underwater · Air-Cooled | Watch out |
Full model index on the machines hub.
Why customers switch
Four things that are hard to copy
Before you ask
Six questions we answer every week
What is the difference between a twin screw and a two-stage line?
A twin screw melts, mixes and builds die pressure on one shaft. A two-stage line splits the jobs: the twin screw compounds and devolatilizes, a single screw builds pressure. Above 85% filler, or with PVC and HFFR, the split keeps output stable — on one shaft, mixing and pressure build-up compete for the same torque.
How do I know which model I need?
Start from the material and the target output, then the torque class, then L/D. A 65 mm screw exists as KTE-65, 65B and 65D with 2×720, 2×860 and 2×1,530 N·m — same diameter, very different capability. We quote the model and the alternative, with the trade-off written down.
Can you run my material before I order?
Yes. Send 25–50 kg; we run it on KTE-20B or KTE-36B and return pellets, a running video and a report with temperatures, screw speed, feeder settings and output per hour. The trial is free — you cover the freight. Turnaround is 3–7 days.
What is the delivery time?
30–45 working days for standard configurations, 45–70 for custom screw geometry or ODM work. Machines are built for the destination voltage and frequency, and test-run with material before shipment.
Do you supply spare parts after delivery?
Screw elements, shafts and liners are machined in our own workshop, so standard sizes ship in 24–48 hours. Every line is delivered with a recommended spare set for the wear zone.
Where are the machines built?
In Nanjing, China. The plant builds screws, barrels and assembly in-house, which is why wear packages can be specified by material rather than picked from a catalogue.
Send 25–50 kg and we run it on our lab extruder: pellets, running video and a capacity report back in 3–7 days.
Twin screw extruder manufacturer — the short version
Note on twin screw extruder manufacturer: the numbers above are reference ranges from Kerke's own trial runs, not catalogue promises. Screw geometry, wear package and pelletizing method are set on the trial bench first, so the output you compare is the output you get. If your grade is not in the tables, send it — the closest configuration is usually a change of screw set, not a different machine.
Planning an upgrade this quarter? Send the material and the target output — the configuration comes back within one working day.
Every quotation lists the wear package as a separate line, so its cost is visible from day one.
Questions are answered the same day, in English or Chinese.
Note on twin screw extruder manufacturer: the data on this page was last verified on our own test line in Nanjing.
Not sure which twin screw extruder manufacturer configuration fits? Describe the material and the pellet shape required — we answer with a recommendation, not a brochure.
A twin screw extruder manufacturer from Kerke ships with CE documentation, a test-run record and a recommended spare set.
Related on this site: Machine range: KTE-50B to 135D · Pelletizing methods compared · quotation and free trial · Wikipedia: Masterbatch