VERFAHREN ZUR HERSTELLUNG VON LÖCHERN, INSBESONDERE MIKRO-PERFORIERUNGEN IN EINEM VERBUNDWERKSTOFF

摘要

The procedure for making holes and especially micro perforations in a composite material consists of testing a sample of the material, then perforating the material using a laser beam at the appropriate temperature using an automatic programme to control the movement of the laser. The procedure for making holes and especially micro perforations in a composite material of mineral or organic fibres in a resin matrix consists of initially testing a sample of the material, using a laser beam directed at right angles to its surface, confining the temperature within the material to a range greater than the melting point of the resin matrix but lower than that causing the physical properties of the fibres to alter. The material itself is then perforated with a laser beam at the appropriate temperature, using an automatic programme to control the laser beam parameters and its movement relative to the material (8). The laser beam generator, comprising a head (10) and a laser emitter (12) connected by an optical fibre (11), has one unit (16) to control the power and focus of the beam and another (15) to change the beam's position, forming perforations of a few square millimeters. An aspiration unit (18) under the e.g. metal grille supporting table (9) removes gases and material residues.