Patent ID: 9657846
Date: 2017-05-23
CPC Classifications: B22D,F16K

Claim:
1. A die casting mold evacuation valve assembly comprising: a valve casing including a front casing part and a rear casing part, whereby machined in the front casing part is an evacuation duct closable by means of an evacuation valve; an actuator for actuating a valve piston of the evacuation valve, the actuator including a casting material actuated force transducer and a force transmission member for transmitting a closing movement of the force transducer to the valve piston of the evacuation valve; and a stacked spring assembly for returning the actuator and/or for ejecting a riser, wherein the front casing part is provided with a sleeve surrounding at least a head part of the valve piston and/or a further sleeve surrounding at least a head part of the force transducer, each sleeve being harder than the front casing part.