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Laboratory Extrusion Coater – Precision Slot Die Coating for Battery Electrode R&D
Our laboratory extrusion coater is designed for coating both anode and cathode slurries onto current collectors using the extrusion (slot die) method. This lab slot die coater offers digital control and full automation – from feeding, unwinding, coating, guiding, drying, to rewinding. As a pilot scale extrusion coating machine, it supports continuous, intermittent, continuous slitting, and intermittent slitting coating modes – ideal for data collection, process validation, and small‑batch production. Coating width 50–500mm, speed 1–3m/min, areal density tolerance ≤±1%.
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What Is a Laboratory Extrusion Coater?
A laboratory extrusion coater is a precision coating system that applies battery slurries onto metal foils via a slot die extrusion head. Unlike transfer coating, extrusion coating delivers superior thickness uniformity, cleaner edges, and better material efficiency – making it the preferred method for R&D and pilot production. Our unit is specifically built for lithium‑ion battery electrode development, allowing researchers to collect reliable data that can be directly scaled to production machines.
Lab Slot Die Coater – Key Features & Functions
This lab slot die coater includes the following advanced features:
Extrusion (slot die) coating head – Provides precise, uniform wet film thickness with minimal material waste.
Digital control – Full automation of supply pump, unwind tension, coating gap, web guiding, drying temperature, and rewind tension.
Multiple coating modes:
Continuous coating
Intermittent (pattern) coating
Continuous slitting coating
Intermittent slitting coating
Purpose – Designed for experimental data collection. Process parameters can be adopted directly by production‑scale coaters.
Application – Suitable for research institutes, universities, and small‑volume production.
Pilot Scale Extrusion Coating Machine – Technical Specifications
As a versatile pilot scale extrusion coating machine, our model delivers the following performance (customizable):
| Parameter | Specification |
|---|---|
| Coating width | 50 – 500 mm |
| Coating speed | 1 – 3 m/min |
| Areal density tolerance | ≤±1% |
| Coating length tolerance (intermittent) | ≤±0.5 mm |
| Front/back coating registration error | ≤±0.5 mm |
| Rewind edge alignment | ≤±0.4 mm |
Custom configurations available upon request (width, speed, drying length, etc.).
Machine Components & Optional Upgrades
Standard configuration:
Slurry supply system (pressurized tank or metering pump)
Unwinding unit + coating head assembly
Electric heating oven (with adjustable temperature zones)
Web guiding system + rewinding unit
Main electrical cabinet with PLC & HMI
Optional upgrades:
NMP concentration detector – For solvent recovery and safety monitoring.
Online thickness gauge – Real‑time areal density measurement (β‑ray or laser).
Front and rear dust covers – To keep the coating environment clean and prevent contamination.
Why Choose This System for R&D and Pilot Production?
Precision – ±1% areal density, ±0.5mm registration, ±0.4mm edge alignment – reliable data for scale‑up.
Flexibility – Four coating modes (continuous, intermittent, slitting, intermittent slitting) in one machine.
Scalable – Parameters developed on this laboratory extrusion coater transfer directly to high‑speed production lines.
Compact & automated – Fully digital control reduces operator error and improves repeatability.
Clean & safe – Optional NMP detection and dust covers protect operators and the environment.
Applications
Battery R&D labs – New material formulation testing, electrode optimization.
Pilot lines – Small‑batch electrode production for prototype cells.
Universities & research institutes – Educational and fundamental research on coating processes.
Process scale‑up – Generate production‑ready parameters for gigafactories.
🔬 R&D Focused – Collect reliable scale‑up data; continuous, intermittent, and slitting coating modes.
🎯 High Precision – ±1% areal density, ±0.5mm registration, ±0.4mm edge alignment.
⚙️ Pilot Ready – Designed as a pilot scale extrusion coating machine for seamless technology transfer to mass production.