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  • Curing
  • Curing by Heat
  • Curing by Accelerated Air

1.3.6.a Curing

 

 

Curing a finish means to bring it to its intended degree of hardness and luster. Before this last decade, we might have been dealing strictly with "baking". Heat is still the primary method of curing a finish. But today's finishes can also be water-based, and heat, although helpful in accelerating the drying of waterborne finishes, is not as effective as air movement.

 

The newest technology involves the use of light without heat to cure the finish.

 

So, curing is the term that we will apply to any means of finishing the finish.

 

  • Curing by Heat
  • SmartCure
  • SmartCure Sequence

1.3.6.b Curing


Curing by Heat

 

Heat curing is accomplished either by heated or super-heated air, or by radiant heat emitted from infra-red lights. Both methods are used in both industrial and refinish situations to cure finishes. Powdercoat and e-coat finishes are cured through a heat cycle, as well as painted finishes.

 

In most cases, when talking about heat curing, the temperature required is referring to the substrate - the surface being painted. For example, in a refinish situation, the heat specification refers to the vehicle's body metal temperature, rather than air temperature, being raised to a specific degree.

 

In refinish terminology, the term "bake mode" is often used to describe the period of time required for curing the paint applied to the vehicle. During this phase, the control unit maintains the operator's pre-selected temperature (up to 199°F) to obtain the standard 140°F surface temperature.

 

The "cool down" phase is the period of time required to cool down the heated vehicle and the booth. This phase starts automatically upon completion of the bake period, and can take as much as 30 minutes for a car.

 

When cured by heat, additional time may have to be allowed for the finish to reach its full hardness. The finish on cars fresh out of a cure cycle is still soft enough to be dented with a fingernail or scratched by buffers. The need for post-cure cut-and-buff can be dramatically reduced through diligent shop cleanliness and contamination control.

1.3.6.c Curing

 

 

"SmartCure™ is absolutely fantastic... It’s helped increase my production by 30%."

 

– Greg Currie
Body Shop Manager
Bill Cook Collision Center
(pictured 10th from left)

 

Faster… reduces cure cycle time by 30-80%


Better… easier to operate, designed for your refinish paint system

 

Less Expensive… reduces energy costs per vehicle

 

SmartCure™ by Global Finishing Solutions, is the only accelerated cure system designed, engineered and tested to work with refinish paint systems. Factory programmed to each system’s specifications, SmartCure™ dries clear coat material precisely as it should be, in the least amount of time, and all with the touch of a single button.

 

SmartCure™ …
- Speeds the curing process over conventional curing methods.

- Increases the number of vehicles a shop can paint in a day, eliminating paint shop bottlenecks and helping meet customer delivery requirements.
- Achieves consistent curing of the vehicle's horizontal and vertical surfaces.
- Works equally well with high solids and conventional clear coat products.
- Features a single-touch button and custom programming, eliminating the age-old dilemma of "what temperature for how long?"
- Is flexible, as programming can be updated if the shop changes paint systems.
- Operates in either the traditional or the SmartCure™ mode.
- Is supported by a toll-free customer service hotline for technical questions.

 

SmartCure™ offers all this and saves the shop money by reducing spray booth energy costs up to 60%. SmartCure™… it's the fastest way to outstanding finishes and higher profits.

1.3.6.d Curing

 

SmartCure Sequence

 

 

The key to curing the finish on a vehicle is the temperature of the metal substrate, rather than the temperature at the paint surface, as one might think. In the production refinish environment, the focus is on consistent, fast throughput. Profit is generated when finishes coming out of the booth are high-quality and ready for the customer the first time.


Accelerated curing contributes to fast and consistent production by offering programmed sequences specifically timed to match the curing characteristics of modern finishes. Electronics and programming control booth cure cycle functioning to bring the metal temperature to the desired 140°F (60°C) within minutes, then maintain a level of functioning that keeps the metal temperature even through the duration of the cure cycle. The accelerated curing process reduces cure times by 30-50%, making even greater throughput possible in the production refinish environment.

 

Faster. Better.

 

Less Expensive.

 

SmartCure™ accelerated curing makes paint shops more profitable.

1.3.6.e Curing

 

AdvanceCure Accelerated

 

Downdraft airflow is generally accepted as the best type of airflow for a paint booth, and generally speaking this is correct. It does an excellent job of controlling overspray and contamination, and provides a safe, clean environment in which to paint. However, there is one limitation that downdraft airflow just cannot avoid. This limitation is the creation of ‘laminar air’ and ‘boundary air’. Laminar air is created as air passes in one direction over a solid object in a paint booth. Boundary air is a low-pressure layer of slow moving air immediately below the laminar air and above the surface of the vehicle.

When looked at under a microscope, even the most perfect paint jobs are not entirely smooth. They have tiny bumps, dips and ridges that are inperceptible to the naked eye. These tiny imperfections slow down the air enough to create a layer of slow-moving air referred to as the ‘boundary air’. During the paint drying process, this boundary air becomes saturated with water molecules from the paint, and limits the speed of evaporation that can take place. It is this boundary air that prevents the airflow from drawing water molecules out of the wet paint.

 

In order to achieve the fastest drying times possible, this boundary air must be disrupted and dispersed. This disruption is accomplished by creating turbulent airflow on the surface of the vehicle, which is what AdvanceCure does. It breaks up the slow-moving boundary air and rapidly speeds up the drying process.

 

With AdvanceCure Turned Off...

 


 


You can see that with AdvanceCure turned off, the traditional top-to-bottom downdraft airflow causes a boundary layer of slow moving air to form on the surface. Vapors and fumes linger on the painted surfaces as a result. This prevents the underlying coating from being exposed to the moving air, and results in curing times that are longer than necessary. This also prevents the coating from curing in the most effective manner, resulting in a less-than-optimum finish quality.

With AdvanceCure Turned On...


 
   
The result of AdvanceCure’s powerful airflow is plain to see. The boundary layer is broken and the illustrative smoke is dispersed much more quickly. This rapid airflow allows the heated moving air to reach the painted surfaces, raise the skin temperature, and draw the vapors and fumes out of the coating at a much faster rate. This minimizes the time required for flash-off and curing, and results in optimum curing for the best quality finish.

 

 

Global Finishing Solutions - The World Leaders in Paint Booth Technology- Paint Booths

12731 Norway Road • Osseo, WI • 54758 • info@globalfinishing.com • 800-848-8738