Die Casting Mold Evacuation Valve Assembly

摘要

A die casting mold evacuation valve assembly (1) features a two-part valve casing (2). Machined in the front casing part (2a) is an evacuation duct (3, 5) closable by means of an evacuation valve (7). Housed in the casing (2) is an actuator (14) for actuating a valve piston (8) of the evacuation valve (7). The actuator (14) comprises a casting material actuated force transducer (15) and a force transmission member (20) for transmitting the closing movement of the force transducer (15) to the valve piston (8) of the evacuation valve (7). The actuator (14) features in addition a stacked spring assembly (23) for returning the actuator (14) and/or force ejecting the riser. The front casing part (2a) is provided with a sleeve (26) surrounding at least the head part (9) of the valve piston (8) and a further sleeve (31) surrounding at least the head part (16) of the force transducer (15). Both sleeves (26, 31) are harder than the front casing part (2a).

主权项

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 the 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 the riser, wherein the front casing part is provided with a sleeve surrounding at least the head part of the valve piston and/or a further sleeve surrounding at least the head part of the force transducer, each sleeve being harder than the front casing part.