34f08f34_rials_patent_application_class__Description
20100025005 02-04-2010 [Description] 
Method for Casting High-Power Wind Turbine Base with Ductile Iron - A method of casting the base of high-power wind turbines with low-temperature nodular graphite iron, use furan resin sand as the mold sand, and there is no riser or chill in the mold. The mold undergoes microseismic compaction, has no chill and riser, and when parting the parting face is perpendicular to the ground. The molten iron solidifies evenly, which greatly reduces the shrinkage holes and disperse shrinkage, and the dregs and air are easy to be discharged. The pouring system designed for the base, together with reasonable pouring rate and time, makes the system useful in blocking the dregs. All areas of the base need to meet the standards of EN DIN12680 Level 2 or Level 3 of the UT tests.
Utilizing particular mold materials patent application class