PRESSURE IMPELLER MOLD AND SEMI-SOLID SHAPING METHOD

摘要

A pressure impeller mold and semi-solid shaping method therefor, belonging to the technical fields of turbocharger impeller manufacture and semi-solid casting. The mold comprises two parts, an outer mold cavity (3) and an inner mold cavity (4), the inner mold cavity (4) being inserted within the outer mold cavity (3); the shell of the inner mold cavity (4) consists of a positioning locking ring (5) and a cover plate (6) and also accommodates a large-vane module (7), a small-vane module (8) and vane root modules (9) having an angle R; a cylindrical hub cavity is centrally arranged within the cover plate (6), the large-vane module (7), the small-vane module (8) and the R-angle vane root modules (9); the cylindrical hub cavity extends to the exterior, forming a plurality of vane cavities, each vane cavity being defined between adjacent modules. When used in conjunction with the present semi-solid casting method, the present mold provides a short casting process with little residual materials, low costs and excellent performance, and also makes possible automated opening and closure of the mold, thus also improving efficiencies and lowering production costs.