Laser drilling process for medical plastic catheter

• Main Authors: HU XUEAN, YU HONGYE, LI SHUJIN, SONG BINJIE
• Format: Patent
• Language: Chinese; English
• Published: 01.09.2023
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

The invention discloses a laser drilling process for a medical plastic catheter. The laser drilling process for the medical plastic catheter is accurate in drilling position, very high in drilling speed and good in hole roundness. The method comprises the following steps: (1) adopting a purple picosecond laser with the wavelength of 355 nm as a laser, wherein the wavelength of 355 nm is easily absorbed by plastic; (2) through beam expanding and beam shaping, circular light spots in Gaussian distribution are converted into circular light spots in flat-top distribution, and the uniformity and consistency of energy distribution in a light spot area range are ensured; (3) the shaped light beam enters a high-speed high-precision galvanometer and then is focused to form a light spot with the diameter smaller than 10 microns; (4) setting a laser process, editing a corresponding hole size through galvanometer processing software according to the required aperture size, and processing a hole meeting the size requireme