QT3-20 Block Machine is very popular in the market. It is multi-function, can produce hollow block, porous block, pavement block, color paver block. And the model QT3-20 machine is hydraulic system, so the block is high density and strength. And it is automatic, just control the machine by the control system, no need person put the pellet, no need person put materials.

https://www.block-machine.net/concrete-block-making-machine/