DIE MOULD FOR MANUFACTURE OF REINFORCED RUBBER TECHNICAL GOODS Russian patent published in 2012 - IPC B29C35/02 B29C45/14 B29C70/48 

FIELD: machine building.

SUBSTANCE: invention refers to manufacturing technology of reinforced rubber technical goods by vulcanisation in a die mould, and can be used for manufacture of elastic support hinges (ESH) of nozzle blocks of solid-propellant rocket engine (SPRE). Die mould for manufacture of reinforced rubber technical goods with layer-by-layer located spherical reinforcement elements and elastomer layers includes a loading chamber and a moulding block with upper and lower fasteners of reinforcement elements made in the form of a rigid rack with teeth. Teeth of fasteners of reinforcement elements are inclined in relation to longitudinal rack axis and located at an angle to it, the value of which varies as to the rack length and is determined by the following formulae: α=90°+β_u-arcsin r_li/R_i for upper fastener of reinforcement elements; δ=90°+β_l-arcsin r_li/R_i for lower fastener of reinforcement elements, where i - ordinal number of reinforcement element; β_u - deflection angle of upper edge of reinforcement elements from vertical plane; β_l - deflection angle of lower edge of reinforcement elements from vertical plane; R_i - radius of spherical surface of i reinforcement element; r_ui - circle radius of upper edge of i reinforcement element; r_li - circle radius o flower edge of i reinforcement element. Use in moulding block of die mould of fasteners made considering the curvature of spherical reinforcement elements, which is variable as to thickness of pack of ESH, provides the setting of similar gaps and simplifies the installation of fasteners between spherical reinforcement elements during assembly of the die mould.

EFFECT: row of high-quality ESH of large-size nozzle blocks of SPRE is made in the die mould and the required manufacturability is provided.

5 dwg