D - Textiles – Paper – 21 – D
Patent
D - Textiles, Paper
21
D
D21D 5/16 (2006.01) B01D 33/067 (2006.01) B23K 26/38 (2006.01)
Patent
CA 2301859
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.
On décrit un procédé de fabrication d'une tôle perforée munie de fentes criblantes (5, 13) découpées dans une plaque mince (1) à laquelle on imprime par flexion la forme désirée. Les fentes criblantes (5, 13) sont obtenues par découpage réalisé au moyen un faisceau laser qui vient heurter la plate-forme depuis un de ses côtés (le côté d'admission). La mise au foyer du faisceau s'effectue à une profondeur préétablie entre les deux côtés de la plaque. La fente est obtenue après au moins deux opérations de découpage consécutives au cours desquelles l'orientation (3, 4) du faisceau laser forme deux angles différents avec le plan principal de la plaque. On obtient ainsi une fente criblante (5, 13) dont la section transversale augmente par rapport à l'autre côté de la plaque (le côté de sortie).
Andersson Roine
Backman Jan
Rundqvist Lars-Goran
Borden Ladner Gervais Llp
Gl&v/celleco Ab
LandOfFree
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