Curing Ovens

Raman Udyog offers a range of electric, gas-fired, infrared, and hybrid curing ovens, available in both batch and conveyorized configurations. Each system is engineered for uniform temperature distribution, fast ramp-up, tight process control, and optimized airflow — ensuring consistent coating performance across various geometries, materials, and part sizes.

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Curing Ovens

Curing ovens are critical to the powder coating process, where the applied powder is thermally cured into a hard, durable film. After coating, components are placed in the oven where they are exposed to controlled heat. This causes the powder to melt, flow, and chemically crosslink.

Oven Type	Heating Source	Operation Mode	Ideal For
Electric Batch Oven	Electric Heaters	Batch (manual load)	Job coaters, small OEMs, clean indoor setups
Gas-Fired Batch Oven	LPG / PNG Burners	Batch (manual load)	Large parts, faster ramp-up, lower fuel cost
Electric Tunnel Oven	Electric Heaters	Conveyorized	Clean lines, medium throughput
Gas-Fired Tunnel Oven	LPG / PNG Burners	Conveyorized	High-volume production, continuous operations
Hybrid Oven	Electric + Gas	Batch or Conveyor	Flexible operations, energy optimization
Infrared (IR) Oven	Infrared Emitters	Tunnel or modular	Pre-gelling, fast-cure applications

Component	Description
Insulated Oven Chamber	Modular panels with double-skin construction and thermal insulation
Heating System	Electric heaters or modulating gas burners (LPG/PNG) with safety shutoffs
Circulation Fans	High-volume blowers for uniform temperature distribution
Digital Temperature Controller	PID or PLC with over-temp protection, soak timers, and ramp profiling
Loading System	Manual trolley (batch), overhead conveyor (tunnel), or motorized loading
Fresh Air & Exhaust Ports	Controlled airflow for fume management and process consistency
Safety Features	Flame detectors, thermocouples, auto shutoff, emergency cutoffs

Oven Type	Energy Source	Average Power / Fuel Use	Approx. Running Cost per Hour (INR)	Notes
Electric Batch Oven	Electricity	15–25 kW/hr	₹150 – ₹250	Based on ₹10/kWh industrial tariff
Gas-Fired Batch Oven	LPG / PNG	1.5 – 2.5 kg/hr (LPG)	₹140 – ₹200	Based on LPG cost ₹90–₹100/kg
Electric Tunnel Oven	Electricity	25–40 kW/hr	₹250 – ₹400	Suited for higher throughput lines
Gas-Fired Tunnel Oven	LPG / PNG	3 – 5 kg/hr (LPG)	₹270 – ₹450	Ideal for large batch continuous production
Hybrid Oven	Electric + Gas	8–15 kW + 1–2 kg/hr LPG	₹250 – ₹350	Uses gas for ramp-up, electric for soak
IR Oven (Electric)	Electricity	10–20 kW/hr	₹100 – ₹200	Rapid heating but best for specific thin parts

Parameter	Specification Range
Operating Temperature	120°C to 250°C (adjustable)
Standard Curing Range	160°C–200°C (most thermoset powders)
Temperature Uniformity	±5°C across oven volume
Insulation	100 mm high-density Rockwool or Mineral Wool
Outer Material	CRCA or GI panels, powder coated or high-temp painted
Control System	Digital PID or PLC-based controller with multi-zone control (as required)
Ramp-Up Time	20–30 minutes to reach curing temperature
Air Circulation	Axial or centrifugal blowers for uniform heat distribution
Oven Sizes	Batch: 6’×6’×10’ up to 8’×8’×16’
Power Source Options	Electric, LPG, PNG, or Hybrid (Electric + Gas)

Decision Guide – Which oven is right for you?

Application Parameter	Recommended Oven Type(s)	Notes
Thermoset Epoxy / Epoxy-Polyester	Electric or Gas-Fired Batch / Tunnel	Cure at 180–200 °C for 10–20 min
Polyester TGIC-Free / Super Durable	Electric Tunnel or IR Hybrid	Needs tighter control ±5 °C, avoid overshoot
Heat-Sensitive Substrates (Aluminium, Zinc)	Infrared or Electric with Soft Ramp	Fast heat-up can cause warping — avoid direct flame
Gloss/Matte Finishes	Any, but precise temp control critical	IR not recommended for textured powders
Textured / Wrinkle Finish	Electric or Gas-Fired with long soak	Allows powder to melt and flow fully without skin defects
Large & Heavy Steel Fabrications	Gas-Fired Batch or Hybrid	Fast ramp-up, better for thermal mass
Small Mixed Parts (Job Work)	Electric Batch	Cleaner, faster changeover
Continuous Production (OEM)	Conveyor Tunnel (Electric / Gas)	Best for high throughput, consistent coating
Outdoor Parts (Epoxy + Poly)	Any, but tunnel ovens ensure curing consistency and corrosion resistance
Powder with Fast-Cure Formulation	IR + Convection Combo	Reduces total cure time to 5–7 min