The aim of the project is to construct a domestic tomatoes grader to be powered by electricity through pulley and belt transmission. The project is to perform crushing on tomatoes. In construction of the project, there are various factors that are being put into consideration.
i.The size specification 
ii.The power of the electric motor to be used
iii.The domestic operation which can be performed by the machine.
iv.The capacity of the machine.

 

 

CHAPTER ONE
1.1                                                        INTRODUCTION
Every year, the final year student of this institution in Higher National Diploma (HND) and the National Diploma (ND) into practice.
This is aimed at justifying the emphasis lead on practical work during the course of study in the assigned to construct a tomatoes grader by the Mechanical Engineering Department, the Polytechnic, Enugu.
A tomatoes grader machine is an equipment used for grinding tomatoes and which can also grind other good crops.  This equipment comprises essentially of an electric motor, belt, pulley, transmission shaft, hopper, mills, spiral conveyor and stands.

1.2                                                 RESEARCH PROBLEMS
            The project research problems are:
i.                    To construct a local fabricated tomatoes grating machine using available local technology.     
ii.                  To construct a machine with a size specification.
iii.                To construct a machine which can perform a domestic operations?
iv.                To construct a machine which has adequate capacity, lighter in weight, lesser fatigue and portable.

1.3                                    JUSTIFICATION OF STUDY
i.                    This is to promote indigenous machine and their producers.
ii.                  To have a portable tomatoes grader constructed for domestic uses with a powered driven source.
iii.                To improve the economic and the country as a whole by neglecting imported blenders i.e producing machine that is affordable to substitute the imported blenders.
iv.                To be able to meet National Board for Technical Education (NBTE) requirement in awarding National Diploma (ND) in Mechanical Engineering.

1.4                                             OBJECTIVES OF THE STUDY
            The objectives of the study are:-
i.                    To construct tomatoes grader with local materials.
ii.                  To construct a machine which is less in crop and domestic usage?
iii.                To produce a tomatoes grader that is lesser in vibration, weight and in size.

1.5                                         SIGNIFICANCE OF THE PROJECT
-It’s fast and can crush tomatoes as finely as any other mill I’ve used. It also can make fantastic crush tomatoes because the coarse settings are easy to adjust.
-It can grind faster.
-It doesn’t heat up the tomatoes like other tomatoes grader can.
-It doesn’t spew tomatoes anywhere.
-it does not change the colour of the pepper.

1.6                                           LIMITATION OF THE PROJECT
The limitations of this project are:
-It cost of production can be higher for students
-It’s noisy.
-The capacity of the hopper is smaller than other heavy-duty mills. you would need to fill the hopper more frequently than mills with a larger capacity.

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