Resin roller and device and method for manufacturing the resin roller

Abstract

A resin roller ( 10 ) is produced by disposing a core body ( 21 ) in a forming metal mold ( 1 ) having a cylindrical metal mold ( 13 ) and core supporting members ( 14 ) furnished at both edge parts of the cylindrical metal mold ( 13 ) as well as causing the core supporting members ( 14 ) to hold said both edge parts, and pouring a farming resin into the metal mold and solidifying it. The resin roller ( 10 ) has the core body ( 21 ) of the same outer diameter over a full length and a cylindrical resin-formed body ( 12 ), sealing members ( 24, 26 ) are furnished around the core body ( 21 ) in the vicinity of both edge parts of the resin-formed body ( 12 ), and the core body ( 21 ) is disposed such that the sealing members ( 24, 26 ) contact edge faces ( 14 a ) at sides of a roller forming space of the core supporting members ( 14 ).

1 . A roller producing apparatus using a thermosetting liquid resin, producing a roller which is composed of a core body and a resin-made elastic layer covering around the core body by use of a metal mold having a structure disposed with core supporting members holding a roller forming space therebetween at both ends of a cylindrical metal mold inserted inside with the core body, 
 characterized in that the core supporting member is provided with a mold-inner pressure adjusting mechanism.    
   
   
       2 . The roller producing apparatus using a thermosetting liquid resin as set forth in  claim 1 , wherein the mold-inner pressure adjusting mechanism provided in the core supporting member is equipped with a volume-variable spare room communicating with the roller forming space.  
   
   
       3 . The roller producing apparatus as set forth in  claim 2 , wherein when an inner diameter of the cylindrical metal mold is D, an outer diameter of the roller is d, and an outer diameter is ds, the inner diameter D of the cylindrical metal mold, the outer diameter d of the roller, and the outer diameter ds are prescribed such that a value of cross sectional shrinkage factor α defined with (D 2 −d 2 )/(D 2 −ds 2 ) is 0.02 to 0.06, and the thickness of the elastic layer expressed with (d−ds)/2 is 1 mm or more.