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

摘要

PROBLEM TO BE SOLVED: To prevent occurrence of bubbles due to residual air in a reinforcing resin coating at an optical fiber connection part. SOLUTION: A mold 1 for molding comprises an upper mold 1a and a lower mold 1b made of a material for transmitting an ultraviolet ray. The mold 1 further comprises a cavity 3 formed of groove-like parts 2c and 2d formed linearly through parting surfaces 2a and 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 1b to cure the resin, thereby forming the reinforcing resin coating.