PRESS-MOULD FOR MANUFACTURE OF RUBBER LINING OF STATOR OF SCREW GEROTOR HYDRAULIC MACHINE

FIELD: rubber industry. ^ SUBSTANCE: invention relates to manufacture of rubber articl3s by pressure die casting, particularly, rubber linings of stator of screw gerotor hydraulic machines, namely, downhole screw motors for drilling oil and gas wells and screw pumps for transfer of liquids. Press-mould for manufacture of rubber lining of stator of screw gerotor hydraulic machine contains core with multistart screw teeth, filler head with inlet channel connected with cast channel coming to forming end face between teeth of core connected with core by threaded joint, and two bushings. One of bushings is installed on filler head, and the other, on side of core opposite to filler head. Hollow housing of stator under manufacture installed on bushing concentrically to core forms molding space together with press-mould. Proposed press-mould improves reliability and service life and accuracy and quality of manufacture of rubber lining of stator of screw gerotor hydraulic machine. This is provided owing to fitting a lock in press-mould. Lock is arranged inside core filler head and is connected by devices to take up torque between lock and core and between lock and filler head. Devices to take up torque between lock and core and between lock and filler head are made, respectively, in form of rollers installed in longitudinal slots of lock and core and in form of pin arranged between cast channels of filler head. ^ EFFECT: improved reliability and increased service life of press-mould. ^ 2 cl, 3 dwg