ABSTRACT

This project (construction of a simple size reduction machine) it was constructed locally with the use of local materials and tools in I. M. T. mechanical engineering workshop. The various parts of the equipment were constructed separately using mild steel before finally coupled. 
During  the construction, the conveyors and its housing where first constructed. It consists of a shaft with helical rod wound round it. The paper was measured out and welded from a mild steel sheet of length of 320mm by 60mm with a thickness of 1 mm and it has the following dimension:
Height of hopper- 160mm Upper part of the hopper – 140mm diameter
    Lower part of the hopper – 100mm diameter
The conveyor was fixed into its housing and welded to the shaft. The grinding chamber was 0welded separately and coupled to the grinding discs. The pressure screw fabricated was welded to the hopper. The U channel was joined to the base stand by welding and existing setup the bearing pulley and the manual handle were all coupled.
    It was filled to smoothen the sharp edge and finally painted for corrosion resistance.
    After the construction work test run was carried out using the grains of wet maize and dried maize. The result shows a greater efficiency in using wet maize.
    Also the high level of noise observed during the test was reduced by fabricating the essential parts with grease.
 
TABLE OF CONTENTS
TITLE PAGE                                      i
LETTER OF TRANSMITTAL                          ii
CERTIFICATION/APPROVAL                          iii
DEDICATION                                      iv
ACKNOWLEDGMENT                                 v
ABSTRACT                                      vi
TABLE OF CONTENTS                             vii

CHAPTER ONE 
1.0    INTRODUCTION                         1
1.1    BACKGROUND OF THE STUDY             1
1.2    STATEMENT OF THE PROBLEM             3
1.3    PURPOSE/AIM/OBJECTIVES OF THE STUDY     4
1.4    SCOPE AND LIMITATION OF THE STUDY     5
1.5    METHOD OF RESEARCH                     7
1.6    SIGNIFICANCE OF THE STUDY             7

CHAPTER TWO
2.0    LITERATURE REVIEW                      9
2.1    HISTORY OF CONSTRUCTION AND USES OF SIZE REDUCTION EQUIPMENT/MACHINE         9
2.2    THEORY OF OPERATION OF SIZE REDUCTION 11
2.3    FACTOR THAT AFFECT T HE EFFICIENCY OF SIZE REDUCTION MACHINE                     14
2.4    TYPES OF SIZE REDUCTION EQUIPMENT     16
2.5     CRUSHES                            17
2.6    APPLICATION OF REDUCTION EQUIPMENT LIKE FRUIT JUICE CRUSHER/EXTRACTOR         20
2.6    FACTORS AFFECTING JUICE CRUSHING EXTRACTOR/MACHINE                     23

CHAPTER THREE
3.0    CONSTRUCTION METHODOLOGY                25
3.1    SELECTION OF MATERIAL FOR CONSTRUCTION 25
3.2    CONSTRUCTION PROCEDURE                       27
3.21    MAKING OUT OPERATORS                   27
3.22    EQUIPMENT USED FOR MAKING OUT           28
3.3    CUTTING OPERATORS                     29
3.4    PRESS SIZE REQUIREMENT FOR CUTTING      30
3.5    PUNCHING/DRILLING OPERATION             31
3.6    WELDING JOINING OPERATION             32
3.7    ARC WELDING                             32
3.72    ELECTRODES USED IN WELDING             34
3.73    SPECIFICATION OF WELDING ELECTRODES    34
3.8    SEQUENCE OF OPERATION                 36
3.81    THE  ROTATING SHAFT AND CONVEYOR HOUSING
3.82    HOPPER                                 37
3.83    SQUEEZE CHAMBER                        38
3.84    PLATE GAP AND ADJUSTMENT SCREW         38
3.85    STANDING                             39
3.86    DRIVEN PULLEY/PRIME MOVER             39
3.86    SURFACE FINISHING AND COATING         40
3.87    SAFETY OF THE OPERATION                 40
3.91    PRECAUTIONS                            41

CHAPTER FOUR
4.0    TESTING OF JUICE EXTRACTOR            42
4.1    PERFORMANCE EVALUATION                 42
4.2    RESULTS                                 44
 
CHAPTER FIVE 
5.1    DISCUSSION                             47
5.2    CONCLUSION                             51
5.3    RECOMMENDATION                         52
    REFERENCES