A UV curing conveyor turns a batch operation into a continuous one. Parts ride a belt through an illuminated tunnel, each receiving an identical dose set by belt speed. The result is uniform cure at production rate with no operator handling between placement and finished part.
Why a Conveyor Changes the Economics
Batch curing means loading a tray, exposing it, unloading, and repeating. Every cycle carries handling time and a risk of misplacement. A conveyor removes those steps. Once the required dose is known, the belt speed is set so that any point on a part spends exactly long enough under the lamp, and throughput becomes predictable: parts per minute equals belt speed divided by part pitch.
Consistency improves as well. On a conveyor, every part passes the same lamps at the same speed and distance, so cure variation between the first and last part of a shift is minimal. The Incure CDM UV conveyor matches lamp head type and belt width to part size and line speed.
Key Benefits
- Continuous flow. No downtime between batches; the line feeds cure and cure feeds the next step.
- Uniform dose. Fixed geometry and speed give repeatable hardness, adhesion, and chemical resistance.
- Lower labor. Parts are placed once and come out cured.
- Energy efficiency. UV cure draws far less power than a thermal tunnel of equivalent throughput, and LED heads draw less still.
- Scalable dose. Adding lamp heads along the tunnel lets the belt run faster at the same dose.
Selecting a Conveyor System
Lamp head. LED heads run cool, switch instantly, and hold output for tens of thousands of hours; the Incure L-Series UV LED flood lamps are a common choice. Broadband arc heads such as the Incure F-Series flood lamps suit resins that need the wider spectrum or a very high peak irradiance.
Wavelength. Match the LED peak or arc spectrum to the resin photoinitiator, confirmed against the data sheet.
Belt width and material. The belt must carry the maximum part size with clearance and tolerate the UV and heat without degrading. Mesh belts allow some light to reach the underside; solid belts do not.
Belt speed range. Confirm the drive can run slow enough for the worst-case dose and fast enough for the target rate.
Cooling and exhaust. LED heads need heat-sink airflow; arc heads need ducted exhaust for heat and any ozone.
If you want help converting a cure dose into a belt-speed and lamp-count specification, Email Us with the resin data sheet and your throughput goal.
Setting the Dose
- Read the required dose (mJ/cm²) and peak wavelength from the resin data sheet.
- Measure the tunnel’s irradiance at belt height with a conveyor-style radiometer that logs the full profile as it passes.
- Calculate the exposure time as dose divided by average irradiance.
- Set belt speed so residence time under the illuminated band equals or slightly exceeds that exposure time.
- Verify cure on sample parts with a hardness or adhesion check.
- Re-run the radiometer weekly to catch output decay.
Common Issues and Fixes
Underside undercure on parts thicker than the light can wrap around: use a mesh belt, add a lower lamp bank, or flip parts for a second pass.
Edge or corner undercure: the illuminated band is narrower than the part or the heads are spaced too far apart. Add coverage or slow the belt.
Shadowing under raised features: a conveyor cannot fix geometry. Add an angled spot lamp over the tunnel or switch to a dual-cure resin.
Thermal distortion of thin substrates under an arc head: move to an LED head, which runs far cooler.
Application Fit
Conveyors suit coatings, potting, gasketing, and adhesive cure on parts that can be laid flat and moved through a tunnel. For fast-handling assembly where the bond must hold immediately after cure, review how UV adhesives compare with epoxy for quick repairs. For low-volume or oversized work that will not fit a tunnel, a cure chamber is often the better tool.
Throughput Planning
Once the dose is fixed, throughput is a function of tunnel length and lamp count. A single 150 mm illuminated band that needs a two-second residence time allows a belt speed of 75 mm per second, or 4.5 meters per minute. If parts are placed on a 100 mm pitch, that is 45 parts per minute. Adding a second identical head doubles the illuminated length to 300 mm, so the belt can run at 150 mm per second for the same dose, and the part rate doubles to 90 per minute. This linear relationship makes it straightforward to size a line to a target: divide the required parts per minute by the achievable rate per head and round up to the number of heads.
Buffer capacity matters too. If an upstream cell stops, a short accumulation conveyor ahead of the UV tunnel keeps the lamps fed and avoids the restart penalty on an arc source. On an LED line the penalty is near zero, so the buffer can be smaller.
Maintenance Schedule
Weekly: run a profiling radiometer through the tunnel and log the result against the qualified baseline. Monthly: clean emitter windows or bulb envelopes and inspect the belt for UV embrittlement, tracking, and debris. At the rated interval: replace arc bulbs or LED modules and re-qualify the dose. Keeping this log turns any future cure defect into a quick comparison rather than a teardown.
Summary
A UV curing conveyor delivers uniform dose at line rate once the lamp head, wavelength, belt, and speed are matched to the resin and the part. Specify irradiance at belt height, validate cure on real parts, and monitor output over time. Contact Our Team to size a conveyor system for your production line.
Visit www.incurelab.com for more information.