Anti-shielding Line for Long Aluminium Profiles
Engineered powder coating lines that reduce Faraday-cage shielding on complex aluminium profiles and help you pass façade, architectural and outdoor durability standards with stable daily production.
Designed specifically for long curtain wall and façade profiles
Gun positioning and recipes tuned for internal corners and channels
Racking, grounding and conveyor concept engineered as one system
Complete line: pretreatment, booth, oven and conveyor integrated
Example layout for 6–7 m aluminium profiles. Real projects are custom designed.
Why Long Aluminium Profiles Are So Hard To Coat
Long architectural and industrial profiles are not designed for easy powder coverage. Deep grooves, tight corners and complicated shapes create strong Faraday-cage effects, so powder is pushed away from exactly where you need protection.
Powder “hides” from recesses and internal corners – outer edges look perfect while inner channels are thin or bare.
Profiles shield each other on standard racks, creating stripes and uneven film thickness.
Rework and hand repair after curing increases labour cost and destroys consistency.
Ketu’s Anti-shielding Line Concept
Instead of simply “adding more guns”, Ketu starts from your aluminium profile itself. We design the entire line around your shapes, target standards and workshop layout.
Review of profile CAD drawings, sample parts and required standards (façade, outdoor, industrial).
Simulation of hanging direction, line speed, gun-to-part distance and oscillation.
Integrated design of pretreatment, booth, oven and conveyor as one system – not separated machines.
Profile-focused design
Engineered around real extrusion shapes
Each gun group, rack position and process parameter is based on the profile families you coat every day.
System engineering
Line as one continuous process
From degreasing to cooling, the line is balanced to your takt time, oven length and operator capacity.
Upgrade-ready
Manual + automatic, scalable over time
Start with combined manual/automatic guns, add more guns or automation later as volume grows.
Real production focus
Designed for daily shifts, not only samples
Stable recipes, easy cleaning, and repeatability are prioritised over only “nice show-room pieces”.
Typical Anti-shielding Line Configuration
A continuous line layout from infeed to finished profile, tuned to your maximum profile length, output and workshop constraints.
1. Loading & Racking
- • Long-profile loading zone with crane or roller support
- • Special hooks and brackets for different extrusion shapes
- • Adjustable profile spacing to avoid mutual shielding
2. Pretreatment (Spray or Immersion)
- • Alkaline degreasing and rinsing zones
- • Conversion coating for aluminium
- • Optional DI / RO final rinse for façade-grade quality
3. Dry-off Oven
- • Stable airflow to dry water inside channels and corners
- • Temperature and time set by aluminium thickness
- • Prevents water marks and flash rust
4. Anti-shielding Powder Booth
- • Multi-angle automatic guns for internal corners
- • Optional pre- and post-manual stations
- • Quick colour change for architectural projects
5. Curing Oven for Long Profiles
- • Side or top burner design, depending on layout
- • Optimised airflow to keep powder stable at edges
- • Temperature uniformity along full profile length
6. Cooling & Unloading
- • Cooling zone before handling and packing
- • Straight-line support for long profiles
- • Integrated packing or buffer area after unloading
Key Engineering Features Against Shielding
Anti-shielding performance comes from the combination of gun arrangement, racking design, grounding and recipe control – not one single element.
Multi-angle gun layout
Guns mounted from top, side and bottom to target channels and internal corners.
Profile-specific racking
Hanging direction and spacing set to expose critical zones instead of hiding them.
Grounding & recipes
Stable electric field and adjustable recipes by profile family for repeatable results.
Where Our Anti-shielding Lines Are Used
Tailored for customers whose profiles must pass strict outdoor, façade or industrial performance requirements.
Architectural Aluminium
Curtain walls, window and door profiles, façade systems and sunshades with demanding visual and durability requirements.
Industrial & Structural Profiles
Racks, frames, equipment profiles and structural shapes with deep grooves and mounting channels.
Special Extrusions
Louvers, railings, decorative profiles and custom shapes for design-driven projects.
What We Need to Design Your Line
A professional design always starts from your real production situation – profiles, workshop size and target standards. With this information, Ketu can prepare a tailored layout and investment estimate.
1. Profile information
- • Typical and maximum profile length
- • Maximum profile weight per meter
- • Profile drawings (PDF / CAD) or sample photos
2. Production targets
- • Daily / shift output in kg or m²
- • Main profile families and colour mix
- • Expected working shifts per day
3. Workshop constraints
- • Building length, width and clear height
- • Doors, pillars, cranes and existing equipment
- • Gas / electricity availability and limits
4. Quality & standards
- • Outdoor / façade or purely indoor use
- • Required lab tests and standards (e.g. salt spray)
- • Any customer-specific quality agreements
Example Layout Concept (for 6.5 m Profiles)
The final line layout will always be adapted to your real building and material flow – this is only one typical case.
Ready to send drawings?
You can send your workshop drawing and profile photos; we will reply with a first concept and discussion points.
Contact Ketu engineering team →Coating Quality and Testing
Anti-shielding performance is finally proven in the lab and in the field. We design your line to support stable film thickness, adhesion and long-term outdoor durability.
- • Uniform film thickness on visible and hidden areas of the profile
- • Good corner and edge coverage to protect sharp profile edges
- • Stable adhesion after curing and cooling, even on internal channels
- • Support for salt spray, humidity, impact and cross-cut testing with your powder supplier
From Line Design to Start-up and Beyond
Ketu supports your anti-shielding line project throughout its full life cycle – not only during the quotation stage.
- • Pre-sales engineering: line concept, layout and budget estimation
- • Manufacturing and FAT: equipment production and functional testing
- • On-site installation and commissioning: real-profile trial runs
- • Process tuning: gun positions, recipes and line speed optimisation
- • Operator training: daily running, changeover and maintenance
- • After-sales: spare parts, troubleshooting and upgrade projects
FAQ – Anti-shielding Lines for Aluminium Profiles
Short answers to the most common questions we receive from aluminium profile coaters.
What does “anti-shielding” actually mean in a powder coating line? ▼
Can my existing aluminium coating line be upgraded with anti-shielding features? ▼
What profile length can your anti-shielding line handle? ▼
Will an anti-shielding design increase powder consumption? ▼
How much workshop space is needed for a long profile line? ▼
Can we start with manual touch-up and upgrade later to more automation? ▼
Plan Your Anti-shielding Line with Ketu
Share your profile length, drawings and expected output. Our engineering team will prepare a first layout concept and discuss the right anti-shielding solutions for your market.
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