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Pounding Machines in America

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ABSTRACT

rroject; designed and manufacture of a yam pounding ~        . i chosen based on the result from the market survey and

:        h.:: e I:materials. Unfortunately, most of these pounders failed to

schte c :~r texture standard of manual pounded yam: They also have — art . - facts especially in the area of motor rating.

Ir. this design, my work.is to-redress the shortcomings in existing cues ar.d introduces new method of delivering enough energy to pound in

i

the bow'. This was achieved by introducing cast iron fly wheel effect into the yam pounding. The result is a better texture of pounded yam, flexible and'increase yam pounding capacity, stronger machine for both domestic and commercial uses.

The machine was design, constructed, assembled and tested according to specification. The performance of the machine was evaluated to its highest level of efficiency of 95% when 3kg of cooked yam was pounded in.

,i^^r03rpHegl3xd?pfiBKr1^pal^naUSfcte^s'^fgater Ueight.

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TABLE OF CONTENT-^

TITLE PAGE -        -

CERTIFICATION DEDICATION - - ACKNOWLEDGEMENT - ABSTRACT- - -        -

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vi

TABLE OF CONTENTA-

NOTIFICATION

CHAPTER ONE        [HTML        V

.0 INTRODUCTION:: '

1.1 . OBJECTIVES-

1.2 RELEVANCE OF THE PROJECT

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2

1.3 SCOPE OF WORK AND METHODOLOGY- -        3

CHAPTER TWO        ^

2.0 LITERATURE REVIEW        -----        5

  1. YAM POUNDERS-        
  2. THE ROTARY YAM POUNDERS
  3. THE RECIPROCATING YAM POUNDERS -

CHAPTER THREE \        ^

  1. DESIGN METHODOLOGY- -        -        -
  2. MACHINE OPERATION AND MATERIALS SELECTS
  3. MACHINE COMPONENT DESIGN-

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CHAPTER FOUR -s-        ^                

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- -BfcE OF MATERIALS/COSTINO^-        -        -        -        31        7

CHAPTER FIVE - 1> \CCAKJ f \ ^        <£\E fC eC>'

TESTING, RESULTS AND DISCUSSION        -        -        -        v33

  1. TESTING-- -------        33
  2. RESULT- --------        33
  3. DISCUSSION        " -        34

CHAPTER SIX <^tw<\Zr{ £>^\ l 

  1. RECOMMENDATION AND CONCLUSION -        -        -        39

AUTO CAD DRAWING (ISOMETRIC) '

REFERENCES-        -        -        -        -        -        -        41

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NOTIFICATION

Bowl area, mi'n V- Driven pulley diameter, mm Motor shaft diameter, mm Temperature factor Shear modulus Shaft lenght, m Bearing life, hours Bending moment, Nm Electric motor speed, rpm Pulley speed, rpm ?a        -        Atial local, N

Radial load, N

Initial yield that would occur at the interval wall of the bowl, N/m2

S2        -        Maximum stress on the belt slack side, Mpa .

Wri        -        Torsional natural frequency, rad/sec,

(3        1        -        Angle of wrap fqruxros'sed'belt drive, radian        __        .        ,

i        Mt.

V        -        Velocity, m/s

i        -        Shear stress

SF        -        Service factor

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Force

C

q

Density of belt, kg/m

Pulley centre distance, mm

Width of belt, rnni belt thickness, mm -.,

Angle of wrap for small pulley

Angle of wrap for small pulley

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CHAPTER ONE

-t— r "

INTRODUCTION

ams (Diosccrea spp) are annual or perennial climbing plants with

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