Core box structure for casting and core making method for manual sand filling

The invention discloses a core box structure for casting and a core making method for manual sand filling. The core box structure comprises a mold locking screw, an upper core box mold, a lower core box mold and a drawing fixture, wherein the upper core box mold and the lower core box mold are locked at the side edge by the mold locking screw; and during mold opening, box lugs are hooked by hook claws at the two sides of the drawing fixture, and a core ejecting screw, a core ejecting plate and a core ejecting rod are arranged at the top of the drawing fixture and used for ejecting and pressing a cured sand core, so that the upper core box mold and the lower core box mold are conveniently separated. According to the designed core box structure, under the condition that a core shooter does not exist, the core box structure for the core shooter is simulated, the core box is filled with core sand by manually folding a soft air pipe and releasing air to enable the soft air pipe to release pressure instantly, and t