... 4.Easy maintenance HJK-50 Clay brick making machine,Double stage vacuum extruder This machine is used to produce solid bricks and ... mixing, vacuum processing, and then the screw auger extrusion system to produce provisions cross-section of ordinary solid bricks, hollow ... .0MPa, it can make both solid and hollow brick; 4. Control: adopts pneumatic clutch; 5. Main axle techniques: Quenching, tempering, ...