METHOD AND APPARATUS TO APPLY A FILL MATERIAL TO A SUBSTRATE

摘要

A method for rapidly adhering thermoplastic polyurethane (TPU) material to a void in a metallic surface, the method comprising placing a solid volume of a TPU over metallic surface; directing a laser toward the TPU; applying pressure on the TPU; and irradiating the TPU material until the material melts and adheres to the metallic surface. Some embodiments make use of a hand-held near-infrared radiation laser tool to irradiate the TPU material, the laser tool comprising a laser optics and fiber; a housing for holding said laser optics and fiber and maintaining a desired distance and orientation of the laser relative to the fastener to be filled; electronics for controlling said laser; a collimator; a beam expander; a laser shield; and a conformal dome or a flat pressure head for holding a solid portion of a filler material in place while the beam is used to melt the material and for applying pressure to the melted filler material.