Performance Evaluation Of Multilevel Sand Screening Machine

Mechanical Engineering

Sand is an important ingredient in construction and civil work , sand needs to be screened properly for various stages in construction , ie size of sand for construction work is slightly coarse where as that used for plaster work is fine . The screening is normally done manually using fixed screens or machines shown below. This is time consuming and laborious work which takes a lot of time and cost. The conventional machine also proves of lesser help as the sand needs to be manually transported and material handling takes place twice to get different sizes of sand. The project aims to develop a working prototype of fully automatic multi-level screening machine where in the sand will be vertically transported with help of vertical screw conveyor mechanism and then screened using two different screens vibrating at two different levels thereby dividing the sand in three parts namely sand for plaster (fine) / sand for construction (medium to coarse) / wastage (very coarse ).The Sand sieving machine was fabricated and testing was done in two parameters as output , namely quantity of sand delivered by the conveyor mechanism (kg/min) and the quantity of sand delivered by the screening machine (kg/min)

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