Desktop & R&D Units
Return to the parent cluster for compact test equipment, sample-prep tools, and lab-scale recycling workflows.
Desktop & R&D Units
Laboratory Twin Screw Extruder for Polymer R&D, Lab Compounding, and Formula Trials
This desktop laboratory twin screw extruder (21 mm parallel twin, 1–5 kg/h, 220 V household power) is built for polymer R&D teams that need repeatable compounding, additive screening, and recycled polymer formulation trials without industrial infrastructure.
- Desktop twin screw extruder with 1–5 kg/h lab-scale output
- 21 mm parallel twin screw with high-torque gearbox, up to 300 °C
- 220 V household power, 20 kg portable — no special installation required
Related Lab and Scale-Up Routes
Searchers comparing a laboratory twin screw extruder often also need to evaluate pre-processing, sister lab equipment, or the production-scale pelletizing route.
View Desktop & R&D Units
Mini Desktop Small Shredder
Useful when lab compounding trials also need controlled sample reduction before drying, feeding, or formulation work.
Recycling Pelletizing Lines
Use this route when the project is moving from laboratory twin screw extrusion toward pilot or production-scale repelletizing.
How a Laboratory Twin Screw Extruder Is Typically Configured
The key buying decision is not only screw diameter. It is how feeding, screw elements, venting, and control zones are arranged for the exact lab compounding task.
1
Define the R&D Formulation Window
Start with the polymer family, additive package, filler load, temperature limits, and whether the trial is focused on dispersion, reactive extrusion, devolatilization, or masterbatch work.
2
Build the Screw and Feeding Layout
Configure conveying, kneading, mixing, side-feeding, and venting sections so the laboratory twin screw extruder behaves like a real process-development platform rather than a simple melting unit.
3
Run Controlled Lab Compounding Trials
Track torque, melt temperature, pressure, feed stability, and output condition across repeatable trial conditions to compare formulas and process windows.
4
Transfer the Data into Scale-Up Planning
Use the lab twin screw results to decide pilot throughput, barrel length, devolatilization strategy, and whether production should stay with twin screw compounding or move to a different extrusion route.
Key Benefits
True Desktop Footprint
Only 0.6 × 0.2 m and 20 kg — runs on standard 220 V household power, no factory wiring or compressed air needed.
Precise Formulation Data
Temperature range up to 300 °C with controlled line speed (1–20 m/min), providing repeatable torque, melt, and output data for scale-up decisions.
Minimal Material Waste
21 mm twin-screw diameter with low dead volume means recipe trials consume only 1–5 kg/h, keeping costly additive and resin usage to a minimum.
Problem / Rumtoo Solution
Problem
Lab trial data is not reproducible between runs.
Rumtoo Solution
Adjustable multi-zone heating up to 300 °C and a high-torque gearbox keep melt conditions stable across batches.
Problem
Recipe changeover takes too long and wastes material.
Rumtoo Solution
21 mm screw barrel with filter screen and compact dead volume enables fast purge and changeover in minutes.
Problem
Lab needs industrial power or a dedicated room.
Rumtoo Solution
Runs on standard 220 V household voltage — 20 kg machine sits on any lab bench without special installation.
Problem
Small-batch trials consume too much raw resin.
Rumtoo Solution
At only 1–5 kg/h throughput, costly additives and experimental polymers are tested with minimal waste.
Input Material and Pellet Output Reference
Lab compounding decisions depend on both the raw polymer feedstock going in and the pellet quality coming out — not just the extruder specification.
Input: Raw Polymer Feedstock
The starting resin form — pellets, flakes, powder, or regrind — determines feeding behavior, melt stability, and the screw configuration needed for your formulation trial.
- Feedstock form (virgin pellet, regrind, powder) defines feeder and screw selection
- Material grade and MFI range set the temperature and torque window
- Additive compatibility is validated against the base resin before trial runs
Output: Compounded Extrusion Pellets
The final pellet quality — uniformity, color consistency, and absence of degradation — is the real measure of a successful lab compounding trial.
- Uniform pellet size confirms stable extrusion and strand cutting conditions
- Consistent color across the batch validates additive dispersion quality
- Clean pellet surface with no voids or discoloration indicates correct thermal profile
Video Demonstration
View the machine workflow under real operating conditions.
Applications
Recycled Polymer Formulation Trials
Validate blend ratios, fillers, and additive packages before pilot or production investment.
Color Masterbatch and Additive Screening
Compare dispersion behavior, torque response, and melt stability under controlled lab conditions.
University and Process Development Labs
Support repeatable teaching, data collection, and scale-up planning for polymer engineering programs.
Technical Specifications
| Parameter | Specification | Notes |
|---|---|---|
| Screw Configuration | 21 mm × 2 parallel twin-screw | With high-torque parallel twin gearbox + filter screen |
| Output | 1–5 kg/h | Varies by material flowability |
| Line Speed | 1–20 m/min | Actual speed depends on downstream setup |
| Processing Temp. Range | Ambient – 300 °C | Adjustable to formulation requirements |
| Motor Power | 180 W | High-torque gearbox for stable low-speed compounding |
| Power Supply | 220 V household voltage | No industrial wiring required |
| Machine Weight | 20 kg | Portable between lab benches |
| Line Center Height | 300 mm | Standard benchtop working height |
| Installation Footprint | 0.6 × 0.2 m (L × W) | Fits standard laboratory benches |
| Extrusion Direction | Left-hand extrusion | Fixed direction from operator side |
The above parameters are standard values. All specifications — including screw configuration, temperature range, throughput, and accessories — can be customized to your specific requirements.
Lab Twin-Screw vs. Lab Single-Screw vs. Batch Mixer
| Feature | Lab Twin-Screw Extruder | Lab Single-Screw Extruder | Internal Batch Mixer |
|---|---|---|---|
| Mixing Quality | Excellent (high shear dispersive) | Moderate | Good but time-limited |
| Continuous Output | ✅ Yes (1–5 kg/h) | ✅ Yes | ❌ Batch only |
| Formulation Flexibility | High — modular screw + side feeding | Medium | Low |
| Scale-Up Data Transfer | Direct — same screw geometry logic | Limited | Indirect |
| Setup Complexity | 220 V plug-and-play, 20 kg | Similar | Heavier, more ancillary |
Frequently Asked Questions
Does this extruder require three-phase industrial power?
No. It runs on standard 220 V household voltage with a 180 W motor — no special electrical work is needed.
What materials and temperature range can it process?
The barrel heats from ambient to 300 °C, covering most thermoplastics including PE, PP, PS, ABS, PA, PLA, TPU, and recycled blends.
How does the 1–5 kg/h output map to production-scale trials?
The small batch size minimizes raw material cost during recipe screening. Once your formulation is locked, torque trends, melt behavior, and additive ratios transfer directly to larger twin-screw lines.
Can the screw barrel be cleaned quickly between formulations?
Yes. The 21 mm barrel with filter screen is designed for fast purging. Most users complete a full changeover in under 30 minutes.
Need a Laboratory Twin Screw Extruder Recommendation?
Send your resin family, target throughput, additive or filler system, and whether the goal is compounding, masterbatch, devolatilization, or recycled polymer R&D.
Go to Contact FormExpert response within 24 hours. No obligation quote.