STIRRING-INJECTION MOLDING MACHINE Russian patent published in 1995 - IPC

FIELD: foundry. SUBSTANCE: machine has frame with injection cylinder 1, plunger formed by piston 3 with guiding sleeve 4, hollow stem 5, stroke limiter fixed in injection cylinder bottom, striker 6, positioned in guiding sleeve and working table 9 with guiding shank 10 disposed in upper cylindrical cavity of striker. Machine is characterized in that it is provided with sleeve 11 fixed on upper part of guiding sleeve 4 and having annular depression made in its inner surface. Depression in conjunction with striker 6 forms air- distributing chamber 18. Machine is further provided with hollow spring-loaded exhaust valve 12 and barrel 15 fixed on piston so that barrel interacts with valve. Striker has channels 23 for periodically communicating inner chamber 22 of plunger with air-distributing chamber 18 and channels 26, 27 for sequentially communicating chamber 24, defined between lower end of sleeve and striker, with air-distributing chamber 18 and atmosphere. EFFECT: increased efficiency and enhanced reliability in operation. 1 dwg