Design, Construction and Testing of a Dry Sand Sieving Machine

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Design, Construction and Testing of a Dry Sand Sieving Machine

ABSTRACT

This research reports on the design, construction and Testing of a dry sand sieving machine. The sample to be sieved is uniformly graded. The coefficient of uniformity is 1.11, thus the machine design does not sieve larger particles such as gravel. The slip calculated is 36% which enabled the proper configuration of the V-belt. The theoretical efficiency of the machine calculated

is 97%. @JASEM

Key Words: Sieving, Uniformly Graded, Coefficient of Uniformity, Slip, V-Belt, Efficiency

The size distribution is often of critical importance to the quality of the casting (product). A sieve analysis can be performed on any type of non – organic or organic granular materials including sands, crushed rock, clays, soil, granite, feldspar and coal, a wide range of manufactured powders, grains and seeds, down to a minimum size depending on the exact method. Being such a simple technique of particle sizing, it is probably the most common. This process can as well increase the production rate of cast products instead of the use of the manual traditional way of sand throwing method through a mesh tray more over up to six different sand sizes can be sample at a time depending on the arrangement of the trays. This design can take four different sizes of sand grains, meaning four different sizes of mesh arranged in layers of preference, from coarse on top to the finest at the bottom.

Sand sieve is of multiplayer and highly efficient. It can screen the materials into multiple levels products according to the different materials grain size.

(McCave and Syvitcki, 199).

The machine is to drive vibrator through v-belt under the power of ordinary motor, so that the screen body along the vibrating power direction to make a cyclical reciprocating, the material in the screen surface to make round movement, so as to make the materials sieved. (www.alibaba.com, June 2010).

Vibration absorbers are devices attached to flexible systems, or dynamic systems in order to minimize the vibration amplitudes at a specific set of points (Khurmi and Gupa, 2005). The use and design of vibration absorbers has long history. First, as proposed by Frahm in 1909, vibration absorbers consists of a second mass-spring device attached to the main device, also modeled as a mass-spring system, which prevents it from vibrating at the

Email: dejiogunwole@yahoo.com

frequency of the sinusoidal force acting on the main device (Den, 1956).

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