1. REPORT ON MY THREE (3) MONTHS INTERNSHIP AT CHEMICAL & ALLIED PRODUCTS PLC.
NAME: UDOMBANA, NSIKAK NSONGURUA.
COURSE OF STUDY: MECHANICAL ENGINEERING.
SCHOOL: COVENANT UNIVERSITY.
DEPT OF ATTACHMENT: ENGINEERING.
ACKNOWLEDGEMENT.
I want to sincerely appreciate firstly; the ManagingDirector, Mrs.Omolara Elemide, for
providing me with such a great opportunity. The Human Resource Manager; Also,the
fantastic engineering team (Engr.Adesoji Atoyebi, Engr. Ibrahim Sadare, Engr.Tola Abiola,
Engr. OlakunleOlatunbosun,Engr.BabatundeOgunleye & Engr. Ademola Oyediran) that
took me undertheir wings and guidance; Mrs. Gladys Adewale, Mrs. Bola, Mrs. Patricia and
Mr. Niyi, for their supportall the way. I say a very big thankyou to you all andpray thatGod
in his infinite mercies blessesyou allabundantly.
OBJECTIVE.
To gain work experience in the field of engineering and get an in-depth & practical
knowledge on some mechanical engineering principles and their applications.
INTRODUCTION.
Chemical & Allied Products Plc. (CAP PLC) is a subsidiary of UAC Foods and a licensee of
AKZNOBEL (The largestproducersof decorative paints in the world).They specialize in the
productionof the foreign based paint, Dulux and their very own home-based paint Caplux.
They are groundedon six (6) core valuesnamely:
A. Customer relevance. B. Respect for individuals. C. Integrity. D. Team spirit. E. Innovation.
F. Openness and communication.
SUMMARY OF THINGS LEARNT.
During my three (3) months internship, I was put through on both mechanical & electrical
engineering practices.
MECHANICAL ENGINEERING.
I was initially taking on a tour around the facility and was introduced to some of the
machines used in the factory suchas:

2. The High Speed Dissolvers (HSDS), Cowless & Spinner machines, Diaf(s), Athritos, Tinting
machines, Shaking machines (A.K.A, Shakers),Dyno mills, etc.
WORKING PRINCIPLES
A. HIGH SPEED DISSOLVERS (HSDS)
It is run usinga pneumatic pump and it operates as follows:
 Air comes into the diaphragm chamber through the suction pipes connected to the
compressor.
 The pressure from the air causes the shaft connecting the two internal diaphragms to
contract, thereby causing the diaphragm on one side to contract. This contraction
causes a vacuum to be created.
 The lower valve through which the paint (base) flows into the pump then opens, as a
resultof the pressure,to fill up the vacuum.
 The diaphragm which had previously contracted, on returning to its initial position
(expansion), pushes/ forces the paint which had previously filled the created vacuum,
throughtheupper valve and outof the pump.
 The base thenflows throughthetransportpipes to severaloutlets.
 The same process is repeated using the other diaphragm. The simultaneous working
of the two diaphragms ensuresthere is a constant desired flow rate.
 The valveused for this machine is called a hurricane valve.
 It has a piston bar, which enables the blades used for stirring, to be raised or
lowered, depending on the task to be carried out.
B. THE SHAKING MACHINE.
The shaking machine is used to thoroughly mix the paint solution after the tinting
machine hasbeen used to add the desired colour to the base.
 It operatesusing a cam mechanism applying the principles of vibration.
Vibration is the fluctuation of a mechanical or structural system
about an equilibrium position.
 Here, the vibrations are created due to eccentricity i.e. two bodies having different
centres of rotation.
 The cam which is driven by the rotor in the electric motor has two weights attached
to its ends.The weights weigh more than the cam itself.
 The cam system in this machine is designed similar to the crankshaftin a car’s engine.
 Hence, as the cam rotates, the eccentricity causes vibrations (forced) to be
produced. The vibration then shakes the machine, which then mixes the solution
properly.
 But there are four springs at each corner of the machine, which serve as dampers to
absorb,contain & eventuallyreduce the vibrations to zero level.

3.  I was also shown a centrifugal pump and understood its working principle, alongside
other pumps.
 I was taught how to operate a mother lathe machine. I carried out the following
machining operations: step-turning,facing, drilling, boring.
 Was shown the entire process involved in offloading diesel from the tankers to the
generator. This is accurately done with the aid of a flow meter & integrity can (20
litres).
 I was taken to the boiler room and shownhow the boiler operates.
 I also learnt a bit about refrigeration and air conditioning. Any refrigeration system
must have these four components: Evapourator, Condenser, Compressor &
Expansion valve.
ELECTRICALENGINEERING.
After series of observations & learning, I was conveniently able to replace bad fluorescent
tubes. It entailed firstly replacing the bad filament tube with a new one. If it doesn’t still
work then:
 Firstly, the starter is to be checked and replaced. The starter acts as a capacitor, i.e. it
stores up excess energy. Starters are of different types: S2 (Green; uses 18 watts), S4
(Blue or White; Uses 58-65 watts)& S5 (Blue or White; Uses 58-65 watts).
 If conditions persist, then the choke is to be checked to determine if voltage is
passing through to the tube. The choke acts as a step-down transformer, as the tube
cannot take in the normal 220-240 volts supplied. Hence it drops the voltage to that
which is required to power the filament tube.
 If the choke is burntor bad, thenit shouldbe replaced.
I got to understandthefunctions of both a contactor and an overload relay.
 Contactors serve as voltage regulators for machines and other electrical appliances.
They are responsible for transferring the required voltage needed by each machine in
order to avoid damage.
 Overload relays are similar, in the sense that they also regulate voltage by tripping
the power off in cases of overloading.
Contactorscan be connected in two modes:
1. Direct-Online Connection: It requires just one contactor and is not applicable
when variation of speed is required. It is used when power below 7KW is being
transmitted.
2. Star Delta Connection: Used in electrical motors where variation of speed is
needed to operate the machine under consideration e.g. the fire hydrant pump in

4. front of the canteen. It is used when power from 7 KW and above are to be
transmitted.
I got to understand the simple difference between single – phase and 3-phase machines,
which is;
 Single phase machines are powered with voltage between 220-240 volts while 3-
phase machines are powered with voltagebetween 385-415volts.
 Single phase machines carry just one live wire while 3- phase machines have three (3)
live wires.
CONCLUSION.
This is just a brief summary compared to the vast knowledge I gained in my three months at
CAP PLC. I am sincerely grateful for this great opportunity given to me, to gain working
experience that will be needed in the foreseeable future. It is an honour to have been a part
of the CAP family. Thank you all.