Pits FRP grating

FRP grating Notes 1, due to the low density, light weight, easy to install fiberglass grille float tube in high water table areas, must be considered to set the town pier or divert storm water runoff and other anti-floating measures. 2, has been installed on the glass steel grille opening tee, repair cracks and other pipeline construction, requirements similar to the plant completely dry conditions during the construction and use of resin and fiber cloth need 7-8 hours of curing, and on-site construction and Repairing generally difficult to meet this requirement. 3, the existing underground pipeline detection equipment to detect metal pipes mainly based, and non-metallic pipes detection equipment is expensive, and therefore can not be detected after FRP grating buried, other subsequent construction units in construction dig easily hurt, damaged pipes. 4, FRP grating UV poor. Surface mounted FRP grid by making a resin-rich surface layer 0.5mm thick and ultraviolet absorber (processing plant), to slow down the aging time. Over run time, the rich resin layer and an ultraviolet absorber will be destroyed, thus affecting their life. FRP Grating FRP Grating production process production process there are three types: reciprocating filament winding process, a continuous filament winding process and the centrifugal casting process. Reciprocating filament winding process (of fixed length method): In this process method, dipping tank with rotating mandrel reciprocates, long fiber glass from an oblique angle relative to the mandrel axis auxiliary release, auxiliary angle (ie wind angle) than the control, translational motion dipping tank movement speed and mandrel rotation speed by dipping tank by computerized machine - control circuit. Winding layers gradually increased wall thickness to meet the design so far. After winding is complete, the article substantially cure the resin. After curing, emerge from the glass pipe in mandrel. Continuous filament winding process (of a continuous process): The process is in motion through a tube supplying prepreg roving, chopped fiberglass and resin sand mixture feeding station, the tube is continuously advancing mandrel in steel. Centrifugal casting process (of fixed length method): In this process, with chopped glass fiber reinforcement and sand, feeding fixed bearing on the steel mold, injecting a catalyst in steel end unsaturated resin, so impregnating a reinforcing material, by centrifugal force, displace the fibers and the resin filler in the air, thereby producing a dense nonporous composite material, the inner wall of the tube due to centrifugal force and form a smooth, rich smooth inner surface layer of the resin, pipe curing at higher temperatures. With this method of manufacturing a pipe known as RPMP. Using a shuttle filament winding pipe manufacturer in the world much more than the other two manufacturers of production technology, in part because of the reciprocating filament winding glass pipe manufacturing process has a broader purpose, suitability better.