DZK series clay brick making machine is divided into Double stage vacuum extruder and single stage vacuum extruder:

1) Double stage Vacuum brick extruder can make three kinds of brick, solid brick, porous brick and hollow bricks. To produce different kinds of bricks, usually, only need to fix different brick die. It is composed of upper stage mixing parts and lower stage extruding parts;

2) Single stage vacuum extruder usually can produce solid bricks. It has only lower stage extruding parts;

You can get hollow bricks too if your soil quality is very high.

3) Double stage vacuum extruder has higher capaicty ,higher vacuum pressure than single stage vacuum extruder . Also double stage extruder green bricks contains less moisture