MOLDING DIE, METHOD FOR REINFORCING OPTICAL FIBER CONNECTION PART, AND OPTICAL FIBER CABLE

摘要

PURPOSE: A molding die, method for reinforcing optical fiber connection part, and optical fiber cable is provided to prevent occurrence of bubbles due to residual air in a reinforcing resin coating at an optical fiber connection part. CONSTITUTION: A molding die(1) comprises an upper mold(1a) and a lower mold made of a material for transmitting an ultraviolet ray. The molding die(1) further comprises a cavity(3) formed of groove-like parts(2c,2d) formed linearly through parting surfaces(2a,2b) of the mold, a resin casting gate(4) and a resin discharging gate(7) communicating with the cavity(3). A method for reinforcing the optical fiber connection part comprises the steps of inserting the connection part of the optical fiber(10) into the cavity(3), casting an ultraviolet curable resin in the cavity(3) at a periphery of an exposed part of a glass fiber(11) from the gate(4) disposed at on coating end of the fiber(10), discharging a part of the resin from the gate(7) disposed at the other coating end, and emitting the ultraviolet ray through the mold to cure the resin, thereby forming the reinforcing resin coating.