A disclosed cavity-pasting full-mold
casting method comprises: (1) preparing a frame mold and enabling the core-space contour structure of the frame mold to be corresponding to the exterior contour structure of a
casting; (2) employing a ground pit for molding, firstly filling pit-
bed sand on the bottom of the ground pit, then paving a layer of clay
sodium silicate sand, leveling, and hardening with
carbon dioxide, putting the frame mold, taking the inner-side edges of the frame mold as a basis, pre-embedding a pouring
pipe, filling the outer periphery of the frame mold with sand and strickling the inner side at the same time; (3) employing
carbon dioxide to harden the sand mold, and then taking out the frame mold; (4) preparing a foam mold plate according to the wall thickness of the
casting, taking a mold hole as a basis, pasting the foam mold plate on the mold holes, and during molding of the foam mold plate, embedding a
resistance wire into a segment, from an ingate to an open riser, in the foam mold plate; (5) putting the open riser, and filling the core space of the casting with sand; (6) employing
carbon dioxide to blow and harden the core-space mold sand, then accessing the
resistance wire with a power supply, and fusing the foam mold plate under
electric heating; and (7) pouring, solidifying, cooling and cleaning.