DESIGN OF MELON DE-HUSKING AND SEPARATION MACHINE

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INTRODUCTION
Nigeria is an agricultural nation. Melon (Citrullus Vulgaris) is widely cultivated in Nigeria, among other seedlings during the planting season yearly. Several tones of the melon seeds are gathered each harvesting period but only very low percentage of the total harvest are dried by atmospheric draught and bagged for storage. High percentage waste is encored due to lack of good processing and storage facilities.Melon when properly processed yields a lot of by-products, which could be used as food or as raw material for small and large scale industrial manufacture melon is highly enriched with oil. It has about 45% oil content. The oil could be extracted to form a very good source of vegetable oil. After pressing out the oil, the remaining product can be used as food for human of as an additive in agro-feed manufacture. Melon without oil can be grounded and used as thickener or binder in the chemical and pharmaceutical industries.The outside shell of the melon seeds when properly harvested in large quantity can equally be used in preparation of agric feed. The shell has about (12-55) MJ/kg calorific value and therefore can be used as a source of energy for industrial use.The major problems encountered in the processing of melon seeds are the removal of the yellow outside shell and the separation of the broken shells form the white seeds. Locally as at now, manual approach is used for the de-husking and separation.

TABLES OF CONTENT
Title page                                    ii
Dedication                                    iv
Acknowledgement                                v
Table of Content                                vi

CHAPTER ONE
1.1    Introduction                             1
1.2    Description of the Design Melon                3
1.3    Principles of Operation                         6
1.4    Advantages                                 7
1.5    Objectives                                 8
1.6    Scope                                    9
1.7    Beneficiaries                             10

CHAPTER TWO
2.1    Review of Some Properties                     11
2.2    Some Local Variety of Melon Used                 11
2.3    Manual De-Husking                        15
2.4    Singular Method of Manual De-Husking            15
2.5    Manual Batch Method of De-Husking                15
2.6    Mechanized Method of De-Husking                16
2.7    Advantages                                 18
2.8    Disadvantages                             19
2.9    Melon Treatment Before De-Husking                20

CHAPTER THREE
3.1    Mechanics of Operation of Melon De-Husking        21
3.2    Circular Motion and Centrifugal Force (FC)            22
3.3    Rotational Torque (T)                        24
3.4    Work Done by a Torque                         24
3.5    Force Analysis on Shaft                        25
3.6    Volume of Air Generated (VA)                    29

CHAPTER FOUR
4.1    Design Calculations                         30
4.2    Optimal De-Husking Speed                    30
4.3    Angular Velocity of Ratio of the Impeller (W)        30
4.4    Centrifugal Force Developed (FC)                31
4.5    Torque Developed (T)                        31
4.6    Power Developed (P)                        31
4.7    Loads of Shaft of the Electric Motor                32
4.8    Friction and Particle Motion                     33
4.9    Determination of the Bearing Reaction R1 and R2        36

CHAPTER FIVE
5.1    Manufacturing Processes for the Melon De-Husking    39
5.2    Assembly Process                            49
5.3    First Test Run                            50
5.4    Second Test Run with Treated Melon                 50
5.5    Cost Analysis                             52
5.6    Conclusion                                 55
5.7    Recommendation                            56
References                                    57

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DESIGN OF MELON DE-HUSKING AND SEPARATION MACHINE

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