House Manufacturing Company, Inc.
Celebrating 60 Years in Business
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Oven-Fused Coating

Powder Paint Line

In 1997, after two years of careful planning, a fully computer controlled powder coating system was installed to apply an oven-fused Polyester TGIC powder coating to our product line.

Polyester TGIC coatings utilize the epoxy functional cross-linker TGIC (triglycidylisocyanurate). Use of this low molecular weight, multifunctional cross-linker, enables polyester TGIC formulations to contain 90% or greater resin within the binder system.

Unlike urethane coatings, polyester/TGIC coatings maintain excellent mechanical properties at film builds above 3 mils with no out-gassing (TGIC is non-blocked).


The cleaning process begins with the steel components being steel shot blasted to a SSPC-6 commercial gray quality.  (Manual steel shot blast for touch up if required.) The BCP shot blast room is utilized for compressed air cleaning to remove shot from crevices and horizontal surfaces of steel components.

The components will enter a 5 stage batch washing system consisting of:

  1. alkaline cleaner

  2. water rinse

  3. iron phosphate coating

  4. water rinse

  5. non-chrome seal rinse

Drying occurs in a IHEI batch dry-off oven at 225 ºF to flash off any moisture remaining on the steel components.
Cleaning System


Load Bar

 

Electrostatic application of TGIC powders are applied manually in an environmental room that controls humidity at less than 50%.

Curing of these components is accomplished in a 450ºF maximum temperature curing oven.  The oven has three load bar locations to permit proper curing time that may vary 40-55 minutes (Curing times are dependent on metal thickness).

Cooling of approximately 60 minutes is achieved by the three load bar stations between the curing oven and the "lowerator" loading and unloading station.

Coating thickness is checked prior to off-loading the steel components with a thickness meter.  If the proper thickness is not met, then the steel components will go back to the oven where it is melted down and begin the process again.
   

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