Method of manufacturing laminated mold and laminated mold

Abstract

For manufacturing the laminated mold comprising the laminate ( 11 ) being formed of a plurality of thin sheets ( 11 a ) laminated on each other, laminate the thin sheets with the excess portions of respective thin sheets exceeding the profile of the tire crown portion on the side of contacting with the tire stepping face left, then remove the excess portions, form the sector mold by placing the laminate ( 11 ) with the excess portions removed in the holder, form the laminated mold having the annular read pattern by arranging a plurality of the sector mold in a peripheral direction of the tire so as to suppress formation of the stepped shape appearing on the tire profile comparing with the one as originally intended.

1 . A manufacturing method of a laminated mold comprising a laminate being formed by laminating a plurality of thin sheets in a widthwise direction or in a peripheral direction of a tire comprising the steps of, 
 previously tapering respective thin sheets on the side of a tire stepping face so as to have an angle approximately the same angle corresponding to the profile of a tire crown portion, and after tapering the thin sheets, proceeding lamination of those thin sheets.    
   
   
       2 . The manufacturing method of the laminated mold according to  claim 1 , the thin sheets are tapered by a laser machining.  
   
   
       3 . The manufacturing method of the laminated mold according to  claim 1 , the thin sheets are tapered by a shot blast.  
   
   
       4 . A laminated mold comprising of a laminate being formed of a plurality of thin sheets laminated in a peripheral direction of a tire, characterized in that bumps are provided on the lamination surfaces of respective thin sheets in a thicknesswise direction thereof so that thin sheets are caused to mutually abut in a laminationwise direction through the bumps so as to fix spacing between the thin sheets.  
   
   
       5 . A laminated mold consisting of a laminate according to  claim 4  characterized in that the bumps are formed by a press work.  
   
   
       6 . A laminated mold consisting of a laminate according to  claim 4  characterized in that thickness of the thin sheets falls in the range of 0.1˜3 mm.  
   
   
       7 . The manufacturing method of the laminated mold according to  claim 1 , when laminating a plurality of the thin sheets in a peripheral direction of the tire comprising the steps of, 
 providing bumps on lamination surfaces of respective thin sheet in a thicknesswise thereof so that the thin sheets are caused to mutually abut in a laminationwise direction through the bumps so as to fix spacing between the thin sheets.    
   
   
       8 . The manufacturing method of the laminated mold according to  claim 2 , when laminating a plurality of the thin sheets in a peripheral direction of the tire comprising the steps of, 
 providing bumps on lamination surfaces of respective thin sheet in a thicknesswise thereof so that the thin sheets are caused to mutually abut in a laminationwise direction through the bumps so as to fix spacing between the thin sheets.    
   
   
       9 . The manufacturing method of the laminated mold according to  claim 3 , when laminating a plurality of the thin sheets in a peripheral direction of the tire comprising the steps of, 
 providing bumps on lamination surfaces of respective thin sheet in a thicknesswise thereof so that the thin sheets are caused to mutually abut in a laminationwise direction through the bumps so as to fix spacing between the thin sheets.    
   
   
       10 . A laminated mold consisting of a laminate according to  claim 5  characterized in that thickness of the thin sheets falls in the range of 0.1˜3 mm.