Hand-operated construction equipment

A Swaziland based engineering company offers a variety of hand-operated construction equipment aimed at small industries.
Although their factory in Matsapa is relatively new, New Dawn Engineering (NDE) has been developing appropriate technology since 1984.
The company is known for its comprehensive approach to development, design and m {mosimage}A Swaziland based engineering company offers a variety of hand-operated construction equipment aimed at small industries.
Although their factory in Matsapa is relatively new, New Dawn Engineering (NDE) has been developing appropriate technology since 1984.
The company is known for its comprehensive approach to development, design and manufacture of labour-intensive production equipment, says research and development manager Crispin Pemberton-Piggot.
As development of appropriate technologies in recent years has been rapid, NDE provides training in the design, building, maintenance, use and economics of its own products, and also in customer specified projects and programmes.
Concrete mixer
The hand-operated concrete mixer has a robust 140 litre drum mixes 65 litres of wet concrete in about 45 seconds. Mixing is done with 21 chains rather than the usual three paddles. It can produce dry mixes for making blocks and bricks in about 90 seconds.
Tile makers
Strong, sand-cement roof tiles can be made with a simple, hand-operated tile maker. The tiles are of conventional (and therefore highly desirable) shape. A floor tile maker is also available.
Brick making
The Terrabric is a ruggedly constructed soil-cement brick making machine. It has axle steel shafts and the top round shaft is of case hardened carbon steel, ensuring that the equipment is able to withstand the high pressures involved in making compressed soil bricks.
The Terrabric uses a minimum amount of water to make bricks. Bricks can be made from either a mixture of soil and cement or subsoil only (depending on requirements). The finished brick size is 290 mm x 154mm x 108mm with which standard 4-1/2 6 and 9 inch walls can be constructed. Because they are made under high pressure, the bricks are solid, smooth-surfaced, strong and have good insulation properties. Capacity maximum is 1,200 bricks per machine per day.
A version of the Terrabric makes two stock bricks (229 x 110 x 75mm) at a time. This machine can also be used to mould clay bricks for firing.
Rock and glass crusher
NDE has designed a manually operated machine for crushing stones in small quantities(pictured).
The rock crusher is fitted with a heavy flywheel with a handle attached to it. Turning the handle causes one of a pair of jaws to move forcefully back and forth. Stones are dropped into the top of the jaws. As they are broken into smaller pieces, they fall lower down where the jaws are closer together. Eventually the pieces are small enough to fall out of the bottom of the machine. Setting the space between the jaws sets the size of crushed stone produced. The larger the pieces required, the higher the throughput. Normally the stone is first broken with a large sledge-hammer to pieces smaller than 150mm x 150mm. Stone crushed into about 40mm-pieces can be achieved with a team of seven workers at a rate of about 5 cubic metres per day. This machine can also be fitted with a double flywheel as an optional extra. Doubling the flywheel mass allows the equivalent operation to be done at a lower speed. It also allows for the breaking of larger or stronger stone as it will have twice the power if run at the same speed as a single flywheel machine.
NDE: Tel +268 518-5016 or 518-4194; fax +268 518-5016; info@newdawnengineering.com