Flash-Off Dryers and Curing Ovens

ENERGY-EFFICIENT DRYING AND OPTIMUM CURING WITH OPTIMIZED AIRFLOW

Flash-off dryers and curing ovens are essential components of modern powder coating systems and liquid paint systems. They complete the pretreatment and coating process by removing residual moisture from workpieces and ensuring the complete curing of the applied coating.

The main difference between a flash-off dryer and a curing oven lies in the heating method and the operating temperature. Both systems are designed to ensure reliable process performance and consistently high coating quality.

Our drying and curing systems are designed in accordance with the current DIN EN 1539 standard. We also have extensive experience implementing the AMS 2750 requirements for the aerospace industry. Reliable drying and complete curing are essential for achieving dry, contamination-free surfaces and ensuring maximum coating quality and durability.

From engineering and manufacturing to installation and commissioning, e. Luterbach AG provides complete drying and curing solutions from a single source. Our many years of engineering experience are reflected in every project, with systems designed to deliver optimized airflow, efficient heat transfer and easy maintenance.

Every drying and curing system is individually tailored to the customer’s workpieces, production processes and operational requirements, ensuring the optimum solution for every application.

Flash-Off Dryers

Flash-off dryers are designed to remove residual moisture from workpieces after the pretreatment process. Specially developed air nozzles generate a turbulent airflow around the workpiece, ensuring efficient and uniform drying. This optimized airflow allows the drying temperature to be kept as low as possible, reducing energy consumption while maintaining excellent drying performance.

Continuous Curing Ovens

A continuous curing oven is the simplest configuration for curing coated workpieces. Components are transported through the oven by a conveyor system, with the curing time determined by the conveyor speed and the overall conveyor length. These ovens are typically designed without doors and instead use airlocks to reduce heat losses.

Although continuous curing ovens generally require a lower initial investment, they have higher energy consumption than other oven concepts.

A-Slotted Curing Ovens

The A-slotted curing oven is one of the most energy-efficient curing solutions available. Unlike conventional continuous ovens, it does not require doors or airlocks, further reducing energy losses. This design requires sufficient building height and is particularly suitable for the efficient curing of smaller workpieces.

Batch curing oven

In most cases, a batch curing oven is used. The openings are closed with doors during the heating process and after each cycle, which saves a significant amount of energy. Workpieces are placed in the batch oven and remain inside until the preset curing time is completed. Airlocks can be installed for large openings to further reduce heat loss.

Gelation zone / Locks

A gelation zone is used when frequent color changes are required. The zone is supplied with hot air, which is generated by the curing oven’s ventilation unit. The curing process begins here, as the powder coating is melted at a low temperature, ensuring high-quality results. The gelation zone can also be considered a temperature airlock, preventing excessive heat loss into the workspace.

Door system

Our oven systems use custom door systems. Depending on part dimensions and available space, we plan either hinged or sliding doors, which can be single or double doors.

Special attention should be paid to the double sliding doors. These doors are motorized, can be individually opened or closed, and integrate complete safety in the drive system, eliminating the need for additional safety strips that need annual checks and replacements.

Technical data:

Typical part dimensions:
Length: 1-12 m
Width: 0.2-2 m
Height: 1-3.5 m

Other dimensions are available on request.

Heating media:
Natural gas
Propane gas
Oil
Electricity
Thermal oil
Hot water
Wood chips

Direct and indirect heating systems are available.

Operating Temperatures
Standard: 40–220°C
Special solutions: up to 300 °C

Temperature accuracy:
up to ±5 °C

Insulation
Insulation material: Rock wool, density 135 kg/m³
Thermal Insulation (U-value): 0.24 W/m²K

Oven wall insulation thickness:
40 – 80°C: 60mm
80 – 220°C: 150mm

Airflow:
5,000 – 100,000 m³/h

Control system:
Demand-controlled exhaust air regulation using a dedicated exhaust fan.

Standards DIN EN 1539
AMS 2750 (Aerospace Industry)

Additional oven solutions: 

Drying cabinets
Condensation dryers
Radiant ovens (gas catalytic / infrared)
Customized industrial oven systems

 

Support-Hotline

On request we offer

24/7 support

for our systems.

 

Kontakt Hotline e. Luterbach AG, zwei Männer stehen am Schreibtisch

e. Luterbach AG

Plant engineering for the painting industry

 

Mülacher 10, CH-6024 Hildisrieden