Dual Sander/High-Pressure Water Cleaning (HP WC) Unit for Recoat Surface Preparation
Small Business Information
3620 W. 11th Street, Houston, TX, 77008
Abstract"The surface preparation industry has always had a need for selectively removing areas of coatings, which have lost their adhesion while maintaining the areas of soundly adhered coatings. Most recently, carefully blasting with grit or ultra-high pressurewater have been the primary means to perform this procedure, although blasting can impair the integrity of sound coatings by fracturing their structure. New environmentally preferred water based coatings have increased the demand for surface preparationthat don't remove the sound coatings since these new coatings don't adhere as well to bare surfaces as their solvent based predecessors.The proposed devise is a remotely controlled vertical wall climbing unit that uses a three-step method to prepare surfaces for recoat without damaging the areas of sound coatings. First, the surface is cleaned with 4,000psi (275 bar) water spray-jets toremove the bulk dirt and grim. Second, grit sanders scuff the areas of sound coating. Finally, 8,000psi (550 bar) water-jets thoroughly remove any dislodged coating or dirt. The All waste is captured beneath a vacuum shroud. The wall climber usespneumatic winches to maneuver over large surfaces. This process will provide a better surface for recoat at a lower cost than equivalent existing methods. A dual sander/high-pressure water-cleaning unit can be used in commercial and military applications where sound coatings do not need to be stripped compl
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