GATING SYSTEM AND METHOD OF CASTING USING IT Russian patent published in 2024 - IPC B22C9/08 

FIELD: foundry.

SUBSTANCE: gating system comprises in-series installed funnel, riser with sump, runners, chambers, filters (6) and feeders (7). Filter is installed between the chamber and the feeder at the angle β=35–90° to the horizontal plane. Gating passages are made along arc with radius R_gp=200–300 mm. Chambers in form of cylindrical cavities (8) are located at angle β₁=30–60° to horizontal plane, and their vertices in form of hemisphere have radius R_c=50–60 mm. When filling with metal, the flow through the funnel and the riser enters the chamber with the filter via the gate. At the moment of flow entry into the chamber, the inertia force F_if is constant, and centrifugal force F_cf1 acting on the flow at the chamber inlet, without changing its value, swirls the flow along the spiral trajectory due to the arc-shaped runner stroke. Centripetal force acting on the flow at the chamber inlet, displacing the flow, creates an inertia force reducing flow turbulence, which, filling the chamber, passes along its section limited by angle δ₁≤90°. In the filled chamber, the flow shifted along the arc limited by the angle δ₂≤180°, when passing through the filter acquires a laminar flow and fills the mold.

EFFECT: higher quality of castings.

2 cl, 6 dwg