Valve, particularly glue valve

摘要

The invention relates to a valve particularly for transferring small portions of glue onto folding tabs of (cigarette) packs. A closing element (15) of the valve is actuated by different elements, that is to say, is moved between the open and closed positions, on the one hand by two permanent magnets (24, 25) arranged a short distance from each other and having aligned poles such that the closing element is permanently kept in the closed position by the permanent magnets (24, 25). On the other hand, an actuating element, which is configured as an electromagnet (23), acts to move the closing element (15) into the open position in a controlled way by overcoming the closing forces. The closing element (15) is designed in a particular way, that is to say, with channels extending along the outside in the longitudinal direction for the medium or the glue.

主权项

1. A valve for fluid media having a valve housing (11), a discharge or valve opening (13), and a closure element (15) which is movable within the valve housing (11) and which, with an end-sided closing piece (16), when the valve is closed, is held in sealing contact with a valve seat (14), the improvement comprising:
a) permanent magnets (24, 25), wherein the closure element (15) is movable in a closing direction into a closing position within the valve housing (11) by a repelling force between the permanent magnets (24, 25) and is urgable into the closing position by the repelling force of the permanent magnets (24, 25) acting in the closing direction so that the closing position of the valve is the normal setting; b) an electromagnet (23), wherein the closure element (15) is movable in an opening direction into an opening position within the valve housing (11) by the electromagnet (23) having an opening force in the opening direction that overcomes the repelling force of the permanent magnets (24, 25), and wherein the repelling force that acts between the permanent magnets (24, 25) in the closing position of the closure element (15) is weaker than the opening force of the electromagnet (23) that acts upon the closure element (15); and c) a first permanent magnet (24) of the permanent magnets (24, 25) being arranged within the valve housing (11) embedded in a fixed support arranged in an inner space (20) of the housing (11) and a second permanent magnet (25) of the permanent magnets (24, 25) being arranged opposite to the first permanent magnet (24) and embedded in the closure element (15), such that the same magnetic poles of the permanent magnets (24, 25) are facing each other and the permanent magnets (24, 25) therefore repel each other, wherein the fixed support is held adjustably in the valve housing (11) by an adjusting screw (41) that protrudes from the valve housing (11), and wherein the adjusting screw (41) is connected to the fixed support by entry and press fitting and/or gluing of a free end of the adjusting screw (41) into an axial recess (42) of the fixed support.