Line 02 / Sowell · NASDAQ LHSW

Coating cells, installed by crews who stood in them.

Sowell Technology has built machine-vision systems since 2007 and launched a 9-axis spray robot in November 2024; it listed on NASDAQ the following April. Pulselink holds the US regional authorization and runs the integrator-facing work: surveys, English technical sessions, negotiation.

At a glanceSowell
01
Robot
Precision Vision AI spray-painting
02
Axes
9 linked: 6-axis arm on a linear track
03
Perception
3D vision + LiDAR, 99.8% recognition
04
Booth
7 × 4 × 2.8 m standard
05
Territory
US regions
02 / Why shops automate

The booth is a labour problem before it is a robot problem.

Body-shop painting is a hazardous trade and fewer people are entering it. These are the figures Sowell publishes from Chinese body shops; a coating cell has to answer them.

01

Labour

A senior painter costs more than RMB 10,000 a month fully loaded, including social insurance and protective consumables. Hiring and keeping one is the shop’s hardest problem.

02

Rework

Hand spraying recoats dark colours 15–20% of the time: uneven film, missed edges, runs, colour drift. Dark paint hides none of it.

03

Paint

Manual passes waste 25–30% of the paint loaded, through overspray and solvent loss. It is paid on every vehicle, not once at installation.

04

Compliance

VOC overspray is an inspection risk. A shop that fails an emissions check is ordered to rectify or suspend operations.

Figures as published by Sowell Technology in its product introduction material.

03 / The robot

Nine axes, one standard booth.

This is not a generic arm dropped into a cage. It is a gantry-mounted 9-axis system that scans the body, generates the path for that body, sprays base and clear coat unmanned, then inspects its own finish — inside a 4 × 7 m booth.

01

Precision Vision

AI spray-painting robot

Vision-guided spraying for automotive sheet metal. The scan locates the work, so the programme follows the panel instead of a fixed teach point.

Typical scenarios
  • Brand 4S dealershipsOEM-level finish on luxury and joint-venture models, with a shorter cycle on accident repair and full resprays.
  • Independent body shopsThe base configuration is the low-cost entry: whole-vehicle and spot work without hiring a senior painter.
  • Chain body-shop centresSeveral units run in parallel for standardised batch work and faster bay turnover.
  • Used-car reconditioningAbout 30 minutes of cell time per coat on a full respray; Sowell cites RMB 500–1,000 of resale value per vehicle.
  • NEV service pointsMatte and special pearl finishes with low electromagnetic interference, so the vehicle electronics are not exposed.
  • Overseas workshopsMulti-language interface, in commercial use in Korea, with local partners in France and South Africa in discussion.
Working environment
  • Standard 7 × 4 × 2.8 m booth
  • No structural rebuild required
  • Explosion-proof rating and extraction checked before install
  • Body-shop and line-side cells
Industry fit
  • Dealership groups
  • Independent repair
  • Chain body-shop centres
  • Used-car reconditioning
  • NEV service
Capability
  • Scan in three to five minutesLiDAR and 3D vision locate the part to be painted. Older and modified vehicles need no stored model or program.
  • 99.8% recognition accuracySowell quotes 99.8% on vehicle and area recognition, and the scan does not depend on booth lighting.
  • Six axes on a linear trackNine linked axes give near-360° coverage, adjusting speed, standoff and pose to the panel curve: corners, roof and bonnet included.
  • Path planned in secondsNo teaching and no CAD model. The trajectory is generated in real time and avoids mirrors, handles and trim.
  • Localised repair, not just whole carsCustom spray areas and a separate repair path for scratches or damaged panels, which is what insurance work actually needs.
  • Gun and fluid controlThe gun switches on and off automatically; paint flow and atomisation pressure are set independently per coating.
  • Colour change without a rebuildThe gun body is cleaned manually or swapped for the next colour; the high configuration changes colour in five minutes or less.
  • Reports, remote support, updatesPaint usage, parameters and job progress export as work orders. Remote diagnostics answer within 30 minutes, and software updates are pushed over the air.
Specification
Arm
6-axis industrial spray robot
Linked axes
9, with the linear track
Track
Heavy-duty precision linear guide module
Gun
SATA precision spray gun, automatic on/off
Fluid control
Flow and atomisation pressure adjusted independently
Perception
3D vision camera + safety LiDAR
Recognition accuracy
99.8%
Scan time
3–5 min per component
Coverage
Near 360° through the nine-axis linkage
Coatings
Solid, metallic, pearl/mica, clear coat; waterborne and solventborne
Colour change
Gun cleaned manually or swapped; ≤ 5 min on the high configuration
Standard booth
7 × 4 × 2.8 m; other sizes customised
System weight
≈ 1,050 kg complete
Installation
About 3 days including commissioning and training
Reports
Work orders, paint usage and parameters, exportable
Support
Remote diagnosis first; overseas engineer on site if needed

Booth size and system weight are the standard Sowell specifies. Confirming floor loading, explosion-proof rating and extraction is part of the site survey, before a project is priced.

How a cell runs
01

Scan

LiDAR and vision build the body model and locate the area to be painted.

02

Plan

A trajectory is generated for that body. It is not recalled from a stored programme.

03

Spray

Base coat and clear coat applied unmanned, 9 axes in continuous reach.

04

Repeat

Each coat runs the same scanned path until the film build is reached.

Sowell Technology (Shenzhen) was founded in 2007 and has traded on NASDAQ as LHSW since April 2025. The robot launched on 5 November 2024 and was shown at Automechanika Shanghai the following month. It is in service in China, exported to Korea, with partners in France and South Africa in discussion. Certifications include explosion-proof, IP68, ISO 9001 and CE; the recognition algorithms have been in development for 19 years and trained on more than 10,000 vehicle models.

04 / Field footage

A cell, running.

Forty-seven seconds inside a working booth: a gantry-mounted arm, a panel on its fixture, a controller cabinet, and someone walking the perimeter. No render, no stage.

01Precision Vision cell, in operation00:47 · Field footageHandheld, through the booth glass.
  • 01The arm hangs from a gantry, not a pedestal. It travels to the work instead of the work travelling to it.
  • 02The part sits on a fixture, not a conveyor. Which is what body-shop and repair work actually looks like.
  • 03The cabinet is the cell. Control, gun supply and safety panel arrive as one unit, not as loose components.
  • 04The booth is glazed. Operators watch the whole pass without opening the door — which matters for finish and for cycle time.
05 / For integrators

Built for the integrator, not around them.

Coating cells are installed by integrators. A channel that cannot hold a technical conversation with an SI is a channel that adds a step. Our job is to shorten the path between the robot and the line.

  • 01Survey with the integrator present Before they quote, not after they have already committed to a layout.
  • 02Technical session in English Run with the people who will program and commission the cell.
  • 03One team through negotiation Commercial terms handled by the same people who walked the booth.
  • 04Handover the integrator can use Documentation written for the installation, not for the archive.
06 / References

Where the cell has run.

Project references below are as published by Sowell in its own introduction material.

01

Korea

Painting project exported to a Korean customer, in commercial use.

02

Tesla body shop, Shenzhen

Body and paint centre installation.

03

Guangzhou

Automotive repair centre project.

04

Toyota 4S, Shaanxi

Dealership body-shop installation.

The US line is currently in commercial negotiation. Integrator conversations are open, and a site condition survey is run before a concept is priced.

A coating cell is commissioned once. Get the booth interface right the first time.
Field rule

Customer names follow Sowell’s own published wording. We re-confirm consent before a reference is quoted in a proposal.

07 / Buyer questions

What buyers ask before a purchase order.

Answers are drawn from Sowell’s own operating documentation. Final specifications, cycle times and service terms follow the configuration selected, the site survey and the contract.

01What is the start-up procedure?

Check booth ventilation, the explosion-proof systems, air supply and power. Power on the controller and wait for the self-check to finish. Inspect the gun and lines for blockages and confirm paint supply and pressure. Load the program on the operator panel, run a test spray to verify atomisation, then place the workpiece and start production.

02Does switching vehicle model or colour need a new program?

No model-specific program change is required. Radar and 3D cameras scan and model the vehicle in real time, so the path is generated for the car in front of the robot.

03How is the robot operated?

Six modules: start-up self-check, program selection, teach programming, parameter adjustment, automatic spraying, and shutdown and maintenance. An illustrated operating manual ships with the cell; installation and operation training videos are recorded by Sowell’s engineers for the customer.

04How heavy is the system?

About 1,050 kg for the complete system: frame, spray gun, paint supply and control cabinet. An earlier six-column package was listed at about 3,050 kg. Final weight follows the configuration and the technical quotation.

05Can it spray a localised area instead of the whole car?

Yes. Spray areas are defined per job and a separate repair path can be set for scratches or damaged panels, which is what insurance and partial refinishing work needs.

06Does it mix paint automatically?

No. The robot sprays; it does not mix. Paint is measured, mixed and stirred by hand to the colour code, then loaded into the gun cup supplied with the system.

07Can it spray pearl or mica finishes?

Yes. Solid colours, metallic, pearl or mica and clear coat are all supported; flow rate and atomisation are trimmed to each coating’s characteristics.

08How long does a full vehicle take?

Robot spraying time for a complete vehicle is 3–6 hours depending on the number of coats, or about 30 minutes per coat. Total turnaround also includes primer drying, baking, cooling and downstream steps.

09Does a different model or size need re-scanning?

Yes. A new vehicle at the working position must be scanned before spraying. Scan time depends on the area: one component typically takes 3–5 minutes.

10Can it spray over imperfect bodywork?

No. The robot performs the spray operation only. Dents, scratches and uneven areas must be repaired, sanded and levelled first; the substrate has to pass before the finish will.

11How long per component, and per coat?

Individual components take 2–5 minutes per coat; a complete vehicle takes about 30 minutes per coat. The real figure follows part size, coat count and the required film build.

12Is it used more on used cars or new cars?

Both. Most repair shops run it on used-vehicle refurbishment and accident repair; it also does new-vehicle full-body spraying and component coating.

13Can it use any automotive paint?

Most commercially available automotive coatings are compatible: waterborne, solventborne, metallic, pearl and clear coat. Special or heavily customised coatings need their properties confirmed before the order.

14What else can it do besides spraying?

The standard configuration includes spraying and automatic gun changing. Gun cleaning and cup changing are available as options.

15What happens if power fails mid-pass?

The area being sprayed can show an interruption or a visible line and may need local sanding and respray. After power is restored the system is set up again. The exact recovery depends on site conditions and the fault.

16What does an existing booth need before installation?

The standard robot suits a booth of about 7 × 4 × 2.8 m inside; other sizes are customised. Space must meet the operating envelope and the floor must carry the load. Explosion-proof rating, ventilation and exhaust must meet robotic spraying safety requirements, and power and air connections must be reserved. Sowell engineers issue a modification checklist from the booth drawings.

17How is the gun cleaned between colours?

The gun body is cleaned by hand, or a second gun is swapped in to cut changeover time. On the high configuration, colour change is quoted at five minutes or less with no residue.

18Is switching between small parts a hassle?

No. Each part is scanned at the working position, so no model or data change is needed between parts of different shapes.

19Is support on site or remote?

Remote diagnosis and video guidance come first. If a fault cannot be resolved remotely, an overseas engineer can attend on site, subject to travel coordination and the terms of the contract.

20Is the booth gantry-mounted or floor-mounted?

The six-axis arm runs on a heavy linear track above the work area, giving nine linked axes. The frame bolts to the floor; the arm travels to the work rather than the work travelling to it.

Bring us a part and a finish spec.

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