DESIGN AND FABRICATION OF A PRINTING MACHINE

By

KALAYOR CHUKWUEMEKA A.E AND 4 OTHER GROUP MEMBERS

Presented To

Department of Mechanical Engineering

Parameters on which clear prints depends were comprehensively investigated.  The study revealed that clear print depends on the impressed pressure the working temperature and the gold foil print paper life expectancy.
Also studies were he manner of dependence of these parameters on prints impressed  on sheets of varied thickness.  The results of these investigation were  utizlied in the design and fabrication of an operational manual printing machine using gold foil   sheet depositor clear prints were impressed on papers during the new machine’s operation.

LIST OF TABLES
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

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

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

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

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

CHAPTER FIVE
5.1    Testing of prototype (test – run)                40
5.2    Evaluation of machine efficiency                40
5.3    Operator’s manual                        41
5.4    Costing  (cost analysis)                    42
5.5    Problems Encounter                        45
5.6    Conclusion                            45
5.7    Recommendation                            46
Reference                                48