PRINTING METHOD FOR PRINTED WIRING BOARD

摘要

PURPOSE:To apply a coating solution onto a screen as thick enough as required by a method wherein a first and a second scraper are made to move up pressing on the front and the rear of the screen. CONSTITUTION:A coating solution is applied onto an upper side of the tip of a first scraper 3. On the other hand, a motor 28 is driven to make a second scraper move up. A motor 22 is driven to make a scraper 3 and a squeegee move up as the scraper 4 keeps moving up when the space between the scrapers 4 and 3 reaches 10-200mm. The scraper 3 moves up precedently and the scraper 4 moves up succeedingly as the scrapers are pressing on the front and the rear of a screen 1, where the scraper 3 fills a coating solution in a screen mesh and the scraper 4 removes an excessive solution which is extruded to the rear of the screen 1 just after the filling operation is completed.