Abstract
In this study, a light weight portable manual food grinder for domestic use was designed and fabricated to meet food grinding needs that arise from erratic power supply in Nigeria. The design analysis for crank lever parameters and conveyor shaft diameter were done. To make the grinder light weight, the body of the machine, the front cover that house the grinding mechanisms and the support stand were printed with Fused deposition modelling 3D printer. The crank lever, conveyour shaft, grinding discs and the adjustment lever were made of cast alumimum metal. The design analysis revealed that an effort force of 600N on the crank lever will inflict maximum twisting moment of 72000 N-mm and 45000 N-mm on the conveyor shaft of the grinder. For the design of crank lever arm, the minimum boss diameter, boss length, boss thickness, lever thickness, lever width, and crank lever diameter were 18.24 mm, 22.9 mm, 3.42 mm, 8.58 mm, 17.36 mm and 14.94 mm respectively. The minimum conveyor shaft diameter was 25.02 mm while the machine required minimum power of 301.59W.
Highlights
The need for grinding of food substances such as pepper, tomato etc. necessitated the design in this article
In this study, a light weight portable manual food grinder for domestic use was designed and fabricated to meet food grinding needs that arise from erratic power supply in Nigeria
To make the grinder light weight, the body of the machine, the front cover that house the grinding mechanisms and the support stand were printed with Fused deposition modelling 3D printer.The crank lever, conveyour shaft, grinding discs and the adjustment lever were made of cast alumimum metal
Summary
The need for grinding of food substances such as pepper, tomato etc. necessitated the design in this article. The electric blender has not been optimally put into use because of the erratic power supply in Nigeria, most especially in rural areas This project was designed to tackle this problem and carry out manual grinding of food substances on a larger scale and in an easier manner than the already existing manual grinders. The mechanism employed were a set of bevel gears intersecting at righ angles with a velocity ratio of 5:1 This is to ease the drudgery encountered when using the existing manual screw grinder. Kevin et al [6] developed a portable multipurpose machine used for milling and grinding of small work pieces very precisely He achieved this using 40C carbon steel for the shaft and 12 volt DC motor of 100 revolution per minutes
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