1)The JKY series are advanced twin-stage vacuum extruder which draw lessons from the developed domestic, abroad experiences and design to make. 2) They are mainly made of high quality steel with features of reasonable structure, sturdy and durability. 3)The machine's axles, gear and other important spare parts extend the service life which are made by carbon steel and alloy steel through modulation or quench's heat treatment procession. 4)They are applicable for the production of solid bricks and high-rate hollow bricks with the materials of clay,coal gangue, shale, high-volume fly-ash, urban construction waste, gangue waste, inferior soil.