Sector of fan and its manufacturing method

Abstract

The present invention relates to a sector of fan and its manufacturing method, including non-skeleton sector and skeleton sector. The non-skeleton sector of fan is molded by injecting polyurethane foam into a sector molding die; the skeleton sector of fan is comprised of a main body and a framework, wherein said main body and the framework are molded together in similar shape with solid casting resin or other similar material; said framework made of steel wire according the sector's shape and size is comprised of an outer shaped ring, reinforcing ribs and a core bar, if necessary inner shaped rings and crossing reinforcing ribs employed for enhancing the intensity of the sector, but it is always in grid structure. Said outer shaped ring, the reinforcing ribs and the core bar are fastened together, and then an assembling disk is fixed on the back end. Combined framework is placed into the inside of the sector molding die, and then inject resin into the molding die, under the normal temperature said resin is foamed and molded, and then open the molding die, take out the molded sector, after buffing treatment and spraying coating paint processes, a sector goods come out.

1 . A sector of fan including sector of ceiling fan, wherein by injecting polyurethane foam into a sector molding die, a sector of fan is molded.  
   
   
       2 . A sector of fan as claimed in  claim 1 , including a framework and polyurethane foam coating the framework in the similar shape; wherein said framework is comprised of an outer shaped ring, a core bar fixed on the center of the outer shaped ring, proper number of reinforcing ribs fixing the core bar on the center of the outer shaped ring, an assembling disk located on the back end of the combined core bar and the outer shaped ring to integrate a together.  
   
   
       3 . A sector of fan as claimed in  claim 1 , wherein inner shaped rings are connected between the outer shaped ring and the core bar with crossing reinforcing ribs.  
   
   
       4 . A sector of fan as claimed in  claim 1 , wherein said reinforcing ribs are arranged between the outer shaped ring and the core bar in asymmetrical array.  
   
   
       5 . A sector of fan as claimed in  claim 1 , wherein the assembling disk is drilled with pilot holes.  
   
   
       6 . A sector of fan as claimed in  claim 1 , wherein the shape of the sector may be manufactured into coconut palm leaf shape, or palm leaf shape, the surface of the sector may be checkered with leaf vein figure.  
   
   
       7 . A sector of fan as claimed in  claim 1 , wherein the framework is manufactured with steel wire according to the shape and size of the sector of fan firstly, next place the finished framework into the inside of the sector injection molding die, then inject polyurethane foam into the injection molding die to mold a sector goods.  
   
   
       8 . A sector of fan as claimed in  claim 7 , wherein the shape of the sector may be manufactured into coconut palm leaf shape, or palm leaf shape, the surface of the sector may be checkered with leaf vein figure.