FIELD: metallurgy.
SUBSTANCE: invention relates to metal casting. Closure plate for a slide closure comprises two outer longitudinal sides, flow-through opening (21, 31) disposed on a central longitudinal axis (A) of closure plate (20, 30, 40, 50) and a closing surface (S) passing from opening. On outer longitudinal sides there are two shoulder surfaces (20a, 20b) serving as clamping surfaces and as centering surfaces, which from with longitudinal axis (A) a tapering angle (α, β) of plate. On shoulder surfaces (20a) on side adjoining surface (S) outer sides (20c, 30c) are made at an angle (γ) to longitudinal axis (A), which is less than angle (α, β).
EFFECT: optimum clamping of plate with reduction of its external dimensions relative to diameter of passage opening.
9 cl, 5 dwg
