The invention discloses a
polishing-free pouring
system for one-mold four-piece
sand casting of a bearing sleeve, and relates to the technical field of pouring. The
polishing-free pouring
system comprises the following steps: carrying out mold manufacturing, specifically, manufacturing a mold, forming a pouring gate in the upper side of the mold, and sequentially forming a
transverse groove set, a vertical groove set, four hot risers and four
casting grooves in the mold; carrying out
smelting, specifically, selecting appropriate
metal materials for mixed
smelting, wherein the
smelting temperature is 1500-1600 DEG C; carrying out pouring, specifically, aligning molten iron with the pouring gate of the mold for slow pouring; carrying out demolding, specifically, taking castings out of the mold after the castings are naturally cooled in the mold; carrying out
machining, specifically, removing residues during
machining; and carrying out encasement, specifically, detecting the quality of the castings, and packing and encasing the castings after the castings are qualified. According to the
polishing-free pouring
system, impurities are filtered while the flow of the molten iron is guaranteed through the
transverse groove set, sand holes of the castings are reduced, and the
mold filling flow speed is decreased; the yield of the castings is increased through the vertical groove set and the
casting grooves, and the four castings are poured at a time; and molten
iron supplement is provided through the hot risers, and the probability that the upper portions of the castings collapse after the molten iron is solidified is decreased.