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WATERMELON JUCE EXTRACTING MACHINE
UGP2016-04
UGP2016-04 2
UGP 2016 - 04• Project Supervisor• Dr Indika Perera
• Group Members
• Jayathilaka R.M.N (EG/2012/1953)• Thennakoon T.M.M ( EG/2012/2092)• Peiris K.A.D.W.S ( EG/2012/2023)
UGP2016-04
Background of the Problem• Tourism hotels and some fruit juice shops store readymade water
melon juice which are not fresh
• Extract watermelon juice without separating seeds
• When trying to remove seeds nutrious part also wasted
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UGP2016-04
Aims and Objectives• Aims
To design and fabricate watermelon extracting machine
• ObjectivesPortable machineSmall in sizeRemove seeds and rindTime savingReduce energy consumptionLow cost
4Jayathilaka R.M.N. out of 29
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Design Process• Morphological Chart• Machine Concepts• Weighted Decision Matrix• 3D Model
Jayathilaka R.M.N. out of 295
UGP2016-04 6Jayathilaka R.M.N. out of 29
Morphological Chart
UGP2016-04
Machine Concepts
Jayathilaka R.M.N. UGP2016-04 out of 297
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Machine Concepts
Jayathilaka R.M.N.
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Weighted Decision Matrix Method Selection Criteria Machine Concepts Weights
Concept 1 Concept 2 Concept 3 Concept 4 Concept 5 Concept 6
R Score R Score R Score R Score R Score R Score
Handling Ease 4 0.8 5 1 4 0.8 4 0.8 2 0.4 3 0.6 20%
Seeds & Rind Removing
4 1 4 1 4 1 4 1 3 0.75 4 1 25%
Durability 4 0.4 4 0.4 3 0.3 2 0.2 3 0.3 5 0.5 10%
Portability 4 0.6 3 0.45 5 0.75 3 0.45 2 0.3 4 0.6 15%
Ease of Manufacture 4 0.6 3 0.45 2 0.3 2 0.3 2 0.3 4 0.6 15%
Dismantle & Cleaning 4 0.6 3 0.45 3 0.45 2 0.3 3 0.45 4 0.6 15%
Total Score 4 3.75 3.6 2.75 2.5 3.9
Rank 1 3 4 5 6 2
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Jayathilaka R.M.N.
UGP2016-04
3D Model
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Jayathilaka R.M.N.
UGP2016-04
CONCEPT TESTING
• In the fabrication process first we made a model of scraper using plastic scratch parts which can be bought from local market and validated conceptual design.
11 out of 29Peiris K.A.D.W.S.
UGP2016-04
• We got 250ml approximately from design and manual methods as well from both half of watermelon
12
CONCEPT TESTING
out of 29Peiris K.A.D.W.S.
UGP2016-04
Fabrication
• we intend to manufacture scraper using plastic molding and 3D Printing but it is very expensive.
• Then we decide to manufacture it using stainless steel plates of gauge 24 (0.635mm).
13 out of 29Peiris K.A.D.W.S.
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FabricationBut then we encountered difficulties in Stainless Steel model Safety issues, Weight, Handling difficulties
out of 29Peiris K.A.D.W.S.
UGP2016-04 15
• we decided to fabricate the scraper using Perspex sheets to overcome the difficulties in Stainless Steel model.
Fabrication
out of 29Peiris K.A.D.W.S.
UGP2016-04 16
• We have fabricated the juice container using a transparent Perspex sheet. It is
a cylindrical container.
• The base frame of the machine was fabricated using ¾ inch mild steel box
bars.
Fabrication
out of 29Peiris K.A.D.W.S.
UGP2016-04 17
• The main rotating shaft was fabricated using one inch diameter nylon shaft. We also fabricated a pulley using 4” diameter nylon bar.• The motor used to power the machine is a 120W electric motor which
used to drive the pulley by a belt.
Fabrication
out of 29Peiris K.A.D.W.S.
UGP2016-04 18
Fabrication
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UGP2016-04 19
Test and Results
out of 29Tennakoon T.M.M.
UGP2016-04 20
Test and Results
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Juice Extraction Raw Data Measured During the Manual Method
Test NoMass of
Fed Sample(g)
Mass of Juice Extracted(g)
Volume of Juice
Extracted(ml)
Mass of Residual Waste(g)
Juice Extraction
Time(s)
01 650 285 270 235 335
02 748 355 340 240 420
03 732 333 330 246 432
04 714 334 325 240 338
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UGP2016-04 22
Average Machine Performance Index during the Manual Method
Test No Juice Yield Extraction Efficiency Extraction Loss
Juice Extraction Capacity
01 54.81 43.85 20 0.81
02 59.66 47.46 20.45 0.81
03 57.51 45.49 20.90 0.76
04 58.19 46.78 19.61 0.96
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UGP2016-04 23
Test No Mass of Fed Sample(g)
Mass of Juice Extracted(g)
Volume of Juice Extracted(ml)
Mass of Residual Waste(g)
Juice Extraction
Time(s)
01 761 357 350 280 300
02 658 307 270 229 225
03 743 370 360 249 219
04 756 354 350 264 256
Juice Extraction Raw Data Measured during the Evaluation of the Prototype
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UGP2016-04 24
Test No Juice Yield Extraction Efficiency Extraction Loss
Juice Extraction Capacity
01 56.04 46.91 16.29 1.17
02 57.28 46.66 18.54 1.20
03 59.77 49.80 16.69 1.64
04 57.28 46.83 18.25 1.37
Average Machine Performance Index during the Evaluation Prototype
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UGP2016-04 25
Comparison between manual and Prototype
Test
Juice Extraction Capacity Juice Yield% Extraction Loss Extraction Efficiency
(
Manual Prototype Manual Prototype Manual Prototype Manual Prototype
1 0.81 1.17 54.81 56.04 20 16.29 43.85 46.91
2 0.81 1.20 59.66 57.28 20.45 18.54 47.46 46.66
3 0.76 1.64 57.51 59.77 20.90 16.69 45.49 49.80
4 0.96 1.37 58.19 57.28 19.61 18.25 46.78 46.83
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UGP2016-04 26
Comparison between manual and Prototype
0 1 2 3 4 50.00
0.20
0.40
0.60
0.80
1.00
1.20
1.40
1.60
1.80
Juice Extraction CapacityJuice Extraction Capacity-Prototype Juice Extraction Capacity-Manually
Sample No
Ext
racti
on C
apac
ity
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UGP2016-04 27
Comparison between manual and Prototype
0 1 2 3 4 50.00
5.00
10.00
15.00
20.00
25.00
Percentage of Extraction LossExtraction Loss-Prototype Extraction Loss-Manually
Sample No
% E
xtra
ction
Los
s
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0 1 2 3 4 540.00
42.00
44.00
46.00
48.00
50.00
52.00
Percentage of Extraction EfficiencyExtraction Efficiency-Prototype Extraction Efficiency-Manually
Sample No
% o
f Ex
trac
tion
Effici
ency
Comparison between manual and Prototype
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CONCLUSION AND FUTURE WORK
• According to the Background of the problem section we designed this machine to be used for Small Scale Business.
• There is no proper machine to extract watermelon juice in a small scale business.
• This machine is designed to operate with a high torque motor.
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UGP2016-04 30
• This machine was designed in a way it use a scraper to scrape the flesh and separate seeds and rind then extract the juice under gravity. The scraper is rotated using a motor.• We hope to develop blades to new sizes, angles and types to increase
efficiency • We hope to complete and test the machine to find the efficiency and
develop to get the maximum efficiency. • We hope to develop and sell this machine to between Rs.3000/- and
Rs.5000/ .
CONCLUSION AND FUTURE WORK
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UGP2016-04 31
THANK YOU