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This project seek to modify the existing cassava grating machine to make it to be self-feeding in operation, to make the operation of the machine easier, safer The existing processing techniques used in the production of cassava starch and cassava dough leaves much to be desired. There are difficulties in the grating of the cassava dough, since the conventional methods available is time consuming and labour intensive. In the modified design, two side hopper, belt drives, gears and pulley will be used to achieve the proposed self-feeding cassava grating machine, also changes will be made to the belts as a result of increasing the center distance due to the hopper that will be introduced and a more speed reducing gear or box will be incorporated. Cassava will be fed with the Machine through the hoppers to be made of metal sheet to the granting drum, which will rotate at a constant speed. This process will grate the cassava into cassava pulp. The chute is to be constructed of metal sheet and it will accept the pulp and send it out.
TABLE OF CONTENT
CERTIFICATION ii
DEDICATION iii
ACKNOWLEDGEMENT iv
TABLE OF CONTENT v
LIST OF FIGURES viii
LIST OF TABLES ix
LIST OF SYMBOLS AND NOTATIONS x
ABSTRACT xi
1. INTRODUCTION
1.1 Background 1
1.2 Processing Cassava into various Products 2
1.3 Statement of the Problem 4
1.4 Objectives of this Work 5
1.5 Justification of the Work 5
2. LITERATURE REVIEW
2.1 Background study of Graters 6
2.2 Traditional Manual Graters 6
2.3 Mechanized Graters 8
2.4 Power Driven Horizontal Cylindrical Graters 9
2.5 The Wadwha Disc Grater 12
2.6 Various Problems and Shortcomings of the Previous Design 14
3. METHODOLOGY
3.1 Design Consideration16
3.2 General Description 16
3.2 Operation Mechanism of the machine 17
3.4 Description of the Machine parts 19
3.5 Materials Selection 26
3.6 The Design Procedures 26
3.6.1 Belt Design 27
3.6.2 Shaft Design 30
REFERENCES 32
LIST OF FIGURES
Fig. 1.1 A Typical Cassava Processing Chain 3
Fig. 2.1 The Traditional Grater 7
Fig. 2.2 Pedal Cassava Grater 9
Fig. 2.3 The Power Driven Horizontal Grater 11
Fig. 2.4 Engine Power Grater 12
Fig 2.5 The Wadwha Disc Grater 13
Fig. 3.1 Side view of the proposed self-feeding cassava grating machine 18
Fig 3.2 The main frame 19
Fig 3.3 The pressing element 21
Fig 3.4 The isometric and side view of the grating drum 22
Fig 3.5 Belt Drive 23
Fig 3.6 The pulley 24
Fig 3.7 Shaft coupling 25
LIST OF TABLES
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