| 摘要 |
FIELD: process engineering.SUBSTANCE: invention relates to screening of materials. This screen comprises flexible moulded polyurethane case with, in fact, parallel lateral extreme sections at the case opposite ends, bottom extreme section arranged between extreme lateral ends, top extreme section arranged between lateral extreme sections and, in fact, parallel and opposed to bottom extreme end, top surface, bottom surface, first moulded single-piece screen structure, second moulded single-piece screen structure, third moulded single-piece screen structure and screening meshes. First screen structure comprises first and second elements that make screening meshes. First elements are, in fact, parallel and extend across extreme lateral sections. Second elements are, in fact, parallel and extend across bottom extreme section and top extreme section. Second screen structure comprises third and fourth elements thicker than first and second elements and section extending downward, below the case bottom surface. Third elements are, in fact, parallel and extend across lateral extreme sections and have multiple first elements located there between. Fourth elements are, in fact, parallel and extend across bottom and top extreme sections and have multiple second elements located there between. First reinforcement elements are moulded integral with third and fourth elements. Third screen structure comprises fifth and sixth elements thicker than third and fourth elements and section extending downward, below the case bottom surface. Fifth elements are, in fact, parallel and extend across lateral extreme sections and have multiple third elements located there between. Sixth elements are, in fact, parallel and extend across bottom and top extreme sections and have multiple fourth elements located there between. Second reinforcement elements are moulded integral with fifth and sixth elements.EFFECT: higher efficiency of screening, longer life.49 cl, 9 dwg |
