Patent ID: 9109306
Filing Date: 2015-08-18
Classification: B29C,B29D,B29K,B29L,D01D,D07B,Y10T

Abstract:
1. A method of producing a cord, characterized in that, when a metal filament is guided to an extruder and plural metal filaments are juxtaposed in a mouthpiece of the extruder and extruded together with rubber from the mouthpiece and then the plural metal filaments thus coated with rubber are supplied to a filament twisting machine to produce a cord, a twist transmitted from the filament twisting machine to the metal filaments thus coated with rubber is eliminated on the outlet side of the mouthpiece, wherein the mouthpiece has a width W calculated by Formula (1) and Formula (2), provided that B represents a clearance in a filament-juxtaposed direction between an outer peripheral edge of the mouthpiece and a corresponding outermost metal filament, and wherein: Formula (1) is: width W (mm)=diameter t (mm) of metal filament×(number of metal filaments to be coated with rubber −1)+t×A Formula (2): A=(clearance B×2+diameter t of metal filament)/diameter t of metal filament.