The invention discloses a low-pressure mold-filling high-pressure solidification
casting device and a
casting method, which can be used in an anti-gravity
casting machine or an
extrusion casting
machine. The device comprises a
casting mold, a
metal melt lifting channel and a
shunting cone, wherein a mold cavity is formed in the
casting mold, the
shunting cone can move up and down, and the shuntingcone has the effects of
shunting and guiding
metal melt at a liquid lifting stage and pressing a filter screen, so that a mold is stably filled with the
metal melt in a mode of laminar flow. After the mold is filled, the shunting cone moves downwards to press a
sprue bushing so as to form a sealing structure, and a metal melt inlet of the
sprue bushing and the mold cavity is sealed. Then
high pressure charging is performed on the metal melt, so that the metal melt is solidified at
high pressure, the
pressure range can reach 0.1 MPa to 160 MPa, and the defects of shrinkage cavities, shrinkageporosity, inclusions,
slag inclusions and the like are avoided. Additionally, optimum structural design is performed on the shunting cone, so that low-pressure controllable stable
mold filling and high-pressure solidification forming of the metal melt are guaranteed. While the metal melt in the mold cavity is applied by a pressure mechanism, the metal melt in the metal melt lifting channel cannotform a solidification shell, so that the service life of equipment is prolonged.