Patent ID: 6491856
Filing Date: 2002-12-10
Classification: B29C,B29K,B29L

Abstract:
A method of centrifugally casting a hollow fiberglass reinforced (FRP) column having straight sides and angled corners and a uniform FRP wall thickness comprising the steps of supporting corner fillers having angled straight sides within a mold having straight interior walls adjacent each mold corner with the straight sides of the corner fillers in parallel spaced relation to the straight interior walls of the mold adjacent the respective mold corners a distance slightly greater than the desired minimum FRP column wall thickness, filling the mold with a predetermined amount of uncured FRP material needed to produce a column having the desired FRP minimum wall thickness, rotating the mold to cause the uncured FRP material to flow by centrifugal force into engagement with the interior walls of the mold intermediate the mold corners and around the corner fillers and into the space between the angled straight sides of the corner fillers and the straight interior walls of the mold adjacent the respective mold corners, continuing to rotate the mold until the FRP material is sufficiently cured to permit removal of the column from the mold, stopping the mold from rotating, and removing the column from the mold.