Fold Up / Stacking Doors

Cronax High-Speed Fold-Up / Stacking Doors are engineered to handle the toughest industrial environments, especially where large openings, high wind loads, and heavy-duty usage are a daily requirement. Unlike traditional roll-up doors, the curtain folds vertically into strong horizontal segments, providing extra strength, stability, and safety in demanding conditions. Constructed with reinforced PVC fabric supported by horizontal steel or aluminum beams, these doors maintain rigidity and resistance against pressure differences, wind, and environmental stress.

Their fold-up design ensures smooth movement, long operational life, and minimal maintenance requirements. With rapid opening and closing cycles, Cronax Fold-Up Doors help streamline logistics operations, reduce waiting times, and improve traffic flow. They also act as an effective barrier against dust, humidity, and temperature variations, making them ideal for both indoor and outdoor industrial applications.

ENGINEERING HIGHLIGHTS
SMART CONTROL SYSTEM
CUSTOMIZATION OPTIONS

Door Type	High-speed fold-up / vertical stacking door with multi-panel folding sections for compact stack storage and fast throughput.
Primary Application	Loading bays, logistics corridors, production lines, cold stores, and hygiene-sensitive areas where rapid cycle rates and tight sealing are required.
Maximum Clear Opening	Standard up to 4500 × 4500 mm; custom engineered sizes commonly available up to ~8000 × 8000 mm depending on model and site constraints.
Operating Speeds	Typical opening speeds 0.8–2.0 m/s (model dependent); closing speeds 0.4–1.0 m/s with adjustable ramping via VFD/frequency control.
Duty Cycle	Designed for high-frequency industrial use (hundreds to thousands of cycles/day depending on drive and model specification).
Wind / Pressure Resistance	Available to meet medium-to-high wind classes (EN wind class options) and tested against static/dynamic pressure loads as required per project.
Curtain / Panel Construction	Multi-panel curtain or insulated panel stacks — options include reinforced PVC fabric (0.9–1.5 mm), insulated composite panels, or lightweight sectional panels for improved thermal performance.
Vision & Access	Full-width or segmented vision panels, pedestrian pass-door options, and multi-row glazing available for visibility and natural light.
Standards & Compliance	Configured to comply with EN 13241 (industrial doors) and regional safety standards; CE or equivalent certification available per model and options.

Drive System	Compact motor with gear reducer and VFD (variable frequency drive) for soft start/stop, speed control and reduced mechanical stress.
Power Supply	230 V single phase for small units; 400/415 V three phase for larger openings (region-specific configurations available).
Control Interface	Standard push-button station (Open / Stop / Close). Optional HMI, remote control, radio transmitters and PLC integration for plant interlocks.
Automatic Activation	Radars / motion sensors, induction loops, photoelectric sensors, and forklift presence detectors; configurable pre-open and hold-open logic for traffic smoothing.
Safety Systems	Safety light curtains, infrared photocells, reversing edge or wireless bottom edge, and torque/obstruction detection with immediate stop & reverse logic.
Positioning & Monitoring	Encoder or electronic limit feedback for precise travel control; optional remote diagnostics, cycle counters and service alerts via modem/fieldbus.
Emergency & Backup	Manual hand crank or release for manual operation; optional UPS/backup power to allow limited controlled operation during outages.
Interlocks & Integration	Door-to-door interlock capability, BMS / PLC signals, conveyor/dock interlocks and safety zone interlocking for multi-door systems.

Frame & Guide Materials	Galvanized steel (standard), powder-coated steel (custom RAL), or stainless steel 304 / 316 for corrosive or hygiene-critical environments.
Curtain / Panel Finishes	Reinforced PVC coated fabric (standard colours), insulated composite panels (textured or smooth finish), or food-grade PVC for wash-down areas.
Colour & Branding	Standard industrial palette plus custom RAL colours and full-surface print/branding (logos, safety striping, lane markings) on curtain or panels.
Sealing & Insulation	Enhanced top/side/bottom seals, foam or brush seals, insulated curtain options and air-loss reduction kits for temperature-sensitive areas.
Windows & Vision	Clear PVC vision strips, polycarbonate glazing, or multi-row windows; sizes and placement tailored to traffic and safety needs.
Hardware Options	Heavy-duty hinges, reinforced folding arms, anti-corrosion coatings, external rain hoods, and wind-resistant rods or ribs for extra stiffness.
Accessories	LED traffic lights, audible warning, traffic barrier interlocks, key switches, pull-cords, remote transmitters and integrated access control readers.
Service & Warranty	Optional preventative maintenance packages, rapid spare parts kits, extended warranty and site commissioning / validation support available.