A manual brick making machine is one that is operated with the help of laborers. This simply means that more human hands are required to operate these machines than automatic machines.When this machine produces hollow blocks, it is called a hollow block machine. It is called a concrete block machine when it produces solid concrete blocks. When you use interlocking molds in your production line, it is called an interlocking brick machine.A brick is a type of construction material used to build walls, pavements and other elements in masonry construction. Properly, the term brick denotes a unit primarily composed of clay, but is now also used informally to denote units made of other materials or other chemically cured construction blocks.