Mold for batch casting of double-screw plastic extruder barrel liner and casting method thereof

The invention discloses a mold for batch casting of a double-screw plastic extruder barrel liner, and belongs to the field of steel metallurgy. The mold comprises two pairs of mold boxes and a straight runner, the mold boxes comprise upper box bodies and lower box bodies, and forming cavities are defined between the upper box bodies and the lower box bodies; mud cores are arranged in the middles of the forming cavities, the bottom of the straight runner communicates with a pair of cross runners, inner gates communicating correspondingly with the forming cavities are arranged at the end partsof the cross runners, the two sides of the mold boxes are provided with side risers, and riser runners are arranged between the side risers and the forming cavities. According to the mold, the two pairs of symmetrically arranged mold boxes are connected through an outer gate, the side risers and the riser runners are arranged on the two sides of the mold boxes, gravity of metal liquid in the siderisers is utilized for cast