Battery Manufacturing EquipmentKejing MSK-AFA-SD300 laboratory slot-die coater
The Kejing MSK-AFA-SD300 is a lab roll-to-roll slot-die coater for electrodes, running continuous or intermittent patterns up to 260 mm wide. Kejing gives a graphite reference recipe at 0.3 m/min and dry loading tolerances of ±1.2% or ±1.5 g/m². It suits labs making single-side and two-side electrode rolls.
By Shenzhen Kejing Star Technology Company · MSK-AFA-SD300
Widths, speed and the graphite example
Kejing lists 300 mm guide rolls, substrates up to 280 mm and a die coating width of up to 260 mm. Mechanical speed is 0.01–1.0 m/min. The reference coating speed is 0.3 m/min for graphite slurry at 2000 mPa·s, 45% solids and 90 µm dry thickness. Plan new recipes from that 0.3 m/min point; 1.0 m/min is the mechanical ceiling.
Single-side dry thickness runs 30–150 µm continuous and 30–100 µm intermittent, depending on the slurry. The die uses a shim opening chosen by the customer. Manual adjustment shows a 1 µm display step, which is a readout resolution; coating accuracy comes from your trial. The supply includes an MSK-156 slurry feed device, and solvent treatment is optional.
| Parameter | Published value | Record status |
|---|---|---|
| Die coating width maximum | 260 mm | known |
| Reference graphite coating speed | 0.3 m/min | known |
| Continuous dry-thickness window | 30–150 µm | known |
Catalogue values apply to the configuration and test method the maker states. Ask for the values that apply to your configuration.
Source references: s1
Loading tolerance depends on the loading level
At loadings of 100 g/m² or more, Kejing states a deviation limit of ±1.2%. Below 100 g/m² it states ±1.5 g/m² in absolute terms, which is a larger percentage at low loading. Both figures leave out the collector mass and abnormal edge areas and assume Kejing's sampling method, so ask for that method in writing.
Agree substrate quality, shim, flow and pressure conditions, and a sample map for dry loading and thickness. If you need the coated edge or the intermittent start and stop areas in your product, put them in the sample map. Kejing lists two-side alignment along the web at ±0.5 mm; agree how the second pass is made before relying on that figure.
Source references: s1
Feed, oven and the drying end point
The standard oven is one 0.8 m hot-air section reaching 150°C, with ±5°C air uniformity at working positions away from the ends. Define air and solvent handling and the electrode temperature or residual solvent target. A stable die and web are only half the job; the electrode must also be dry enough to press.
Trial representative slurry and record flow, speed, shim and oven settings, then repeat after a planned restart. Check die cleaning, slurry held up in the feed, roll guiding and the 60 N tension limit against your foil. Handover should list the installed feed hardware, pump and treatment options, and calibration and adjustment steps. The catalogue tolerances carry the exclusions above, so set your own acceptance figures from your coating trial.
Kejing's profile lists the mixers and calenders around this coater, and the electrode drying page explains what happens to the coated roll before assembly.
Questions that change the purchase
| Decision | What the catalogue says | Next step |
|---|---|---|
| Does the graphite speed apply to your slurry? | The catalogue ties 0.3 m/min to 2000 mPa·s, 45% solids and 90 µm dry thickness. | Run your formulation and record flow and drying settings. |
| Which loading tolerance applies? | The catalogue gives ±1.2% at 100 g/m² or more and ±1.5 g/m² below 100 g/m². | Agree the loading basis and a sample map before acceptance. |
| What does the 1 µm display mean? | The catalogue gives 1 µm as the manual adjustment display step. | Measure dry thickness and loading on your material. |
Prepare the supplier conversation
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Sources and check dates
The maker's own pages and public records used for this page, each with the date it was checked.
s1 · Kejing MSK-AFA-SD300 laboratory slot-die coater original specification
Shenzhen Kejing · Manufacturer-origin source
Kejing's specification for the SD300, with widths, speeds, graphite example, thickness ranges, loading tolerances, alignment and oven.
Archived source check: 2026-10-11
s2 · Official current equipment catalogue
Shenzhen Kejing · Manufacturer-origin source
Kejing's current catalogue listing its slot-die, transfer and dip coaters.
Archived source check: 2026-10-11
Still to confirm
- Coating speed and loading tolerance on your slurry.
- Kejing's sampling method behind the loading figures.
- How the second pass is aligned for two-side coating.
- Drying end point at the 0.8 m oven length.
Slot-die coating of lab electrode rolls
- Collector, slurry viscosity and solids, target dry loading
- Die and shim opening, feed device, flow and pressure
- Continuous or intermittent thickness and pattern
- Sample map, edge exclusions and foil-mass subtraction
- Speed, oven residence and drying end point
- Two-side alignment method, restart, cleaning and options