Patent ID: 8425214

Claim:
A spraying tool for use with a mold spraying device for spraying at least one section of a mold wall of a mold with working medium, the spray tool comprising: a plurality of spray elements for dispensing working medium; and at least one working medium supply line, which carries working medium to the plurality of spray elements, wherein at least some of the spray elements whose spray nozzles point downward during operation are each equipped with a separate valve unit next to the spray nozzle, the valve unit having a valve element elastically prestressed into a closed position, in which it stops the dispensing of working medium, but under the influence of a hydraulic and/or pneumatic pressure, it can be brought into an open position in which it enables the dispensing of working medium, wherein the valve unit has a working medium inlet channel providing fluid communication between the working medium supply line and at least one tapping channel, the at least one tapping channel providing fluid communication between the working medium inlet channel and a valve chamber, with at least one dispensing channel being in fluid communication between the valve chamber and an outlet opening of the valve unit, with the valve element being accommodated in the valve chamber, wherein at least one radial channel opens into a wall section that forms a valve seating surface for the valve element, and wherein a cross section of the valve element is rectangular, with a concave portion defined between neighboring corners of the cross section being arranged to face the wall section so that at least one of neighboring corners is structured and arranged to act as a sealing lip.