Laser scanning-type plastic welding device using bundle fiber

A laser scanning-type plastic welding device using a bundle fiber, which is for welding a first welding edge R1 of a cover P1 made of transparent plastic through which a laser beam is transmitted to a second welding edge R2 of a housing P2 made of opaque plastic with a three-dimensional shape by using a laser beam, the device comprising:

• a scanner 10 comprising a laser oscillator, a light source, and multiple rotatable mirrors, thereby emitting a laser beam (B);
• a beam box 20 installed at a lower side of the scanner 10 so as to form a space through which a laser beam (B) is emitted;
• a first holding plate 30 supported on a lower end of the beam box 20 such that a laser beam (B) is emitted thereto;
• a first bundle fiber 40 supported on the first holding plate 30 and made of multiple first fibers 41, 41′ such that a laser beam (B) emitted thereto branches off into multiple first laser beams B1;
• a second holding plate 50 supported on a pair of bridges 51 extending from the beam box 20;
• a second bundle fiber 60 supported on the second holding plate 50 and made of multiple second fibers 61, 61′ connected to the multiple first fibers 41, 41′, respectively, such that a first laser beam (B2) emitted thereto branches off into multiple second laser beams (B2);
• and
• a beam guide jig 80 for selectively pressurizing a first cover P1 toward a housing P2, the beam guide jig 80 having a channel 81 formed oppositely along the circumference of a first welding edge R1 such that exits of the second fibers 61, 61′ are arranged therein.