CASTING MOLD Russian patent published in 1997 - IPC

FIELD: processing of polymers. SUBSTANCE: when manufacturing hollow articles from plastic by pressure-casting technique, insertion for molding side surface of article is made with cross-section in the form of outer triangle and with central passage for male die 7 whose cross-section is in the form of inner triangle. Insertion has linear (17) and angular (16) parts. Means to control parts of insertion is made in the form of disk 9 with profiled pockets and pins 19 installed in these pockets. Pins are rigidly joined with holders 14 and 15 of parts 16 and 17. Disk 9 is concentrically mounted on side surface of takeoff slab 3 and, through adapter 22, is rigidly joined with additional disk 10. On the basement 4, two-arm lever is pivoted. One arm of lever and adapter 22 are hinged together through sliding bar. The second arm is hinged together with mobile base 8 through pull bar with slot. EFFECT: provided quality manufacturing of hollow parts with triangular cross-section. 3 cl, 13 dwg