| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a laser welding method for welding resin materials, capable of welding even the resin materials molded with general precision and the butt surfaces of them by setting the transmissivity of the second material to proper transmissivity to increase the melting amount of the resin material. <P>SOLUTION: The first resin material (10a) having transmissivity with respect to a laser beam (Pa) and the second resin material (20a), of which the transmissivity of the laser beam is not higher than that of the first resin material, are superposed one upon another and irradiated with the laser beam going toward the joining part of the second resin material from the first resin material. In this laser welding method for the resin materials, the second resin material having a transmissivity of 20-40% is selected. Then, the first and second resin materials are superposed one upon another at an interval of 0.1-1.0 mm and the laser beam with an output of 500 W or above is condensed into a condensing diameter of 1 mm or below by a condensing means to be applied to the joining part of the second resin material so as to fill the interval of 0.1-1.0 mm with the molten second resin material. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
