Publication number: 20050000641
Abstract: The invention relates to a method for laser welding, wherein n plastic parts (1.1, . . . , 1.n) are pressed against each other, respectively forming a boundary layer (2.1, . . . , 2.n-1). An energy-converting medium (4.1, . . . , 4.n-1) is incorporated into each boundary layer (2.1, . . . , 2.n-1) and absorbs the light energy of at least one of several laser beams used (11.1, . . . , 11.m). Irradiation of the boundary layers (2.1, . . . , 2.n-1) by means of the laser beams (11.1, . . . , 11.m) respectively results in a partial melt, whereupon a welding seam point (3.1, . . . , 3.n-1) forms an inner link between the plastic parts (1.1., . . . , 1.n) upon cooling. The energy-converting media can be chosen according to type, coating thickness, etc., so that a melt is obtained upon simultaneous irradiation with two or more laser beams. In another embodiment of the inventive method, a laser beam (11.1) having a wavelength of ?1 is used, the light thereof being partially absorbed in a first boundary layer (2.
Type:
Application
Filed:
September 28, 2002
Publication date:
January 6, 2005
Inventors:
Siegfried Hartmann, Egon Wurr, E.K. Wolff, U. Glotzbach