Design and fabrication of a printing i block machine

• TABLE 1  – Experimental determination of pressure for printing 11- Effect of temperature on sharpness of print. 111 ” Description of (components) parts and materials use for them 1v- comparison of cost and properties of materials LIST OF FIGURES Description Figure 1 sketch of alternative A Figure
• 2.Sketch of alternative B. Figure 3 sketch of alternative C Figure 4 isomeric view of hot plate square housing Figure 5 isometric view of type holder Figure 6 &7 load and free body diagram of crank are (Handle) and rod. LIST OF SYMBOLS A ” Area A ” Acceleration D ” Maximum shaft diameter d- minimum  shaft diameter e- efficiency k ” Thermal conductivity c ” Heat capacity x ” The pressure transmissibility of lever system (press x  1/duration ) t ” Time l ” Length of shaft m ” Mass m ” Maximum bearding moment p – Electric power q ” Quantity of heat TABLE OF CONTENTS Title page ii Letter of transmittal iii Release iv Approval page v Dedication vi Acknowledgement vii Abstract viii List of figures ix  List of tables x List of symbols xi Table of contents xii

Chapter ONE

INTRODUCTION

• 1.1introduction 1
• 1.2literature review and data collection 2
• 1.3experimental determination of pressure for prating 3
• 1.4design specification 9

Chapter TWO

LITERATURE REVIEW

• 2.1Design solutions 11
• 2.2Alternative A press foot printer 11
• 2.3Alternative  B; crank arm  (handle ) 14
• 2.4Alternative  C; automatic (motorized) printer 17
• 2.5Comparison of alternative and choice 20

Chapter THREE

SYSTEM DESIGN AND IMPLEMENTATION

• 3.1Design selection and analysis of parts of chosen alternative 22
• 3.2Theory of  design/  design calculation 24
• 3.3The  design of the shaft (Hollow) 26

Chapter FOUR

SYSTEM TESTING AND EVALUATION

• 4.1construction of prototype 28
• 4.2general 28
• 4.3material selection 29
• 4.4sequence of construction and assembly 40

Chapter FIVE

SUMMARY, CONCLUSION AND RECOMMENDATIONS

• 5.1Testing of prototype (test ” run) 40
• 5.2Evaluation of machine efficiency 40
• 5.3Operator’s manual 41
• 5.4Costing  (cost analysis) 42
• 5.5Problems Encounter 45
• 5.6Conclusion 45
• 5.7Recommendation 46 REFERENCES