MANUFACTURE OF SCREEN PLATE WITH SCREEN SLOTS OBTAINED BY LASER BEAM CUTTING

摘要

A method for manufacturing a screen plate with screen slots from a thin plate (1), which screen slots (5, 13) are achieved by cutting. The plate is formed by bending to a screen plate of a desired shape. The screen slots (5, 13) are produced by means of a laser beam for cutting, which hits the plate from one of its sides, the inlet side. Focus for the beam is situated on a predetermined depth between both sides of the plate. The slot is obtained by at least two cutting operations following each other, in which the direction (3, 4) of the laser beam forms two different angles with the main plane of the plate. At that there is obtained a screen slot (5, 13), the cross section of which increases against the other side of the plate, the outlet side.