METHOD OF FORMING MESH OF WIRE MATERIAL USED FOR PRODUCTION OF FILTER ELEMENTS Russian patent published in 2016 - IPC B21F27/18 B01D39/12 

FIELD: technological processes.

SUBSTANCE: invention relates to methods of producing filter elements from wire material, in particular, for coarse and fine filtration of fluid. There are used two long sections of non-stretched spiral of equal length and different direction of twisting and winding on mandrel of one of long-length sections in cylindrical spiral with pitch equal to or more than two diameters of non-stretched spiral of used long section. Cylindrical spiral is removed from mandrel while ensuring preservation of shape. Stretching in transverse direction of its centre line plane to pitch between turns of non-stretched spiral equal to (0.5-0.8) of its diameter. Fixing in stretched state to form rows of spiral. On formed rows of stretched spiral applying at an angle of 90° or less formed rows of stretched spiral of other long piece of spiral, compressing to each other to mutual penetration into each other and removing fixation.

EFFECT: better adhesion of rows of mesh, possibility to adjust its porosity.

1 cl, 5 dwg