PAPER TITLE :DESIGN, FABRICATION AND PERFORMANCE EVALUATION OF A RECIPROCATING COCOA POD BREAKING MACHINE

FUTA JOURNAL OF ENGINEERING AND ENGINEERING TECHNOLOGY | VOLUME 8 NUMBER 2 2014

Paper Details

  • Author(s) : Akinnuli, B. O., Ayodeji S. P., Abadariki, S. O. and Fasan J. O.
  • Abstract:

A B S T R A C T
After harvesting ripped cocoa pods during primary processing the next operation is the extraction of the wet seeds
from their pods before fermentation. This operation of wet seed extraction is commonly performed manually using
cutlass for cutting into two and using of hands for the extraction of the set seeds. This caused drudgery, low
extraction rate and atimes incised wounds from cutlass used. Hence an electrically or fueled reciprocating engine
powered cocoa pods breaking machine was designed, fabricated and evaluated. It has a crushing chamber of
0.054m3, hammer mass of 15.38 kg, applied force of 150.92 N for breaking pods, rated power of the prime mover
(electric motor or fueled engine) is 1.22 kW, diameter of hammer's shaft is 28.0 mm, the angle of hopper is 210 using
mild steel of 5 mm gauge with friction coefficient of 0.32, total mass of the machine is 145 kg with attached
accessories and its geometric dimension is (1060 x 690 x 460) mm. It's crushing capacity per hour based on size of
pods are 7,600, 5,400 and 3,600 for small, medium and large pods respectively. It's efficiency based on the pod
classifications are: small pods 92.5%, medium pods 87% while the large size is 86.25%. The cost of the machine
considering: material, machining, bought out goods, non – machining and labour costs amount to five hundred and
twenty four US dollar US $524:00.
1. Introduction
Cocoa is a prominent tree crop in Nigeria and is one of the
main cash crops exported in the country. The proportion of the impact
of cocoa exportation in terms of socio economic income is less than
2%. About 30000 households in Nigeria depend on the cocoa economy
for their livelihood (COPAL, 2006). According to Adewumi (1997),
the exported cocoa beans are processed abroad and the required
products are imported to Nigeria at a relatively high cost.
Over the years, from the time of discovery of the cocoa tree,
man has been trying to simplify and modify the procedures of planting,
harvesting and processing the crop through the use of wood in breaking
the pods. The process of breaking of cocoa pods manually required a lot
of manpower as well as time (Opeke, 1987). The efficiency of this
method depends on the variety of the crops and worker's attitude. There
is therefore a need to improve efficiency in order to aid profits and
reduce losses.
The uses of cocoa are numerous, such as beverage, wine chocolate,
cream lotions, body cosmetics, cheap feeds for poultry and pigs, potash
fertilizers, local soap, biogas, particle boards, etc. The cocoa tree is
thought to have originated in the foothills of theAndes in theAmazon
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