Patent ID: 11897218
Assignee: THE YOKOHAMA RUBBER CO., LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A method for cleaning a vulcanization mold by irradiating a cleaning target portion of the vulcanization mold with a laser beam, the method comprising:
providing the vulcanization mold for a tire, and
bringing an irradiation range of the cleaning target portion irradiated with the laser beam into an atmosphere of inert gas, thereby preventing forming of ultrafine protrusions having a height of nm level on a surface of the cleaning target portion cleaned by being irradiated with the laser beam,
wherein an output of a light source of the laser beam is 1 W or greater and 5 kW or less, a pulse width of the laser beam is 11 ns or greater and 500 ns or less, a pulse energy of the laser beam is 1 mJ or greater and 0.1 J or less, a pulse frequency of the laser beam is 3.1 kHz or greater and 100 kHz or less, a beam diameter of the laser beam is from 0.1 mm to 3 mm, and a fluence of the laser beam is 0.5 J/m2 or greater and 4.0 J/m2 or less.