Design and Construction of A prototype of Screw Press for The Collection of Coconut Milk.

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UNTAR

Auditorium M Building, Campus I,

Tarumanagara University

JI. Letjen. S. Parman No. 1,

Jakarta 11440 - Indonesia

''Urban Engineering for Future Generation''

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Jakarta, 22-23 October 2015

2nd

International Conference on Engineering of Tarumanagara

PROCEEDINGS

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SUMMARECON zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA

International Conference on Engineering of Tarumanagara

(ICET)

“Urban Engineering For Future Generation”

Jakarta, 22-23 Oktober 2015

FACULTY OF ENGINEERING

TARUMANAGARA UNIVERSITY

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1. Dr. Harto Tanujaya Tarumanagara University, Indonesia (Chair)

2. Prof. Hui Ming Wee Chung Yuan Christian University, Taiwan

3. Prof. Satoyuki Kawano Osaka University, Japan

4. Prof. Robert Vale Victoria University of Wellington, New Zealand

5. Prof. Brenda Vale Victoria University of Wellington, New Zealand

6. Dr. Ing. A. Rugerri Toni L. Karlsruhe Institut für Technologie, Karlsruhe

Germany and Atma Jaya Catholic University of Indonesia, Indonesia

7. Dr. Sie Teng Soh Curtin University, Australia

8. Dr. Thomas Marconi Delft University of Technology (TU Delft), The

Netherlands

9. Prof. Yahaya Ahmad University of Malaya, Malaysia

10. Prof. Nasir Bin Daud University of Malaya, Malaysia

11. Prof. Mohd. Zulkifly b. Abdullah Universiti Sains Malaysia, Malaysia

12. Prof. Zaidi Mohd. Ripin Universiti Sains Malaysia, Malaysia

13. Dr. Ing. M. Razi Abdul Rahman Universiti Sains Malaysia, Malaysia

14. Dr. Ing. Joewono Prasetijo Universiti Tun Hussein Onn, Malaysia

15. Dr. Mohamed Azlan Suhot Universiti Teknologi Malaysia, Malaysia

16. Dr. Bambang K. Hadi Bandung Institute of Technology, Indonesia

17. Prof. Indarto University of Gadjah Mada, Indonesia

18. Prof. Jamasri University of Gadjah Mada, Indonesia

19. Prof. Tresna P. Soemardi University of Indonesia, Indonesia

20. Prof. I Made Kartika University of Indonesia, Indonesia

21. Prof. Danardono A. S. University of Indonesia, Indonesia

22. Prof. Eddy S. Siradj. University of Indonesia, Indonesia

23. Prof. Dr. Ir. Teuku Yuri M. Zagloel University of Indonesia, Indonesia

24. Dr. Yono Reksoprodjo University of Indonesia, Indonesia

25. Prof. Tjokorda Gde Tirta Nindhia Udayana University, Indonesia

26. Prof. Ngakan Putu Gede Suardana Udayana University, Indonesia

27. Prof. I Gusti Bagus Wijaya Kusuma Udayana University, Indonesia

28. Prof. Kuncoro Diharjo Sebelas Maret University, Indonesia

29. Prof. I Nyoman Pujawan Sepuluh November Institute of Teechnology,

Indonesia

30. Prof. Hadi Sutanto Atma Jaya Catholic University of Indonesia,

Indonesia

31. Dr. Iftikar Z. Sutalaksana Bandung Institute of Technology, Indonesia

32. Prof. Tri Harso Karyono Tanri Abeng University, Indonesia

33. Dr. Rianti Ariobimo Trisakti University, Indonesia

34. Prof. Roesdiman Soegiarso Tarumanagara University, Indonesia

35. Prof. Chaidir A. Makarim Tarumanagara University, Indonesia

36. Prof. Agustinus Purna Irawan Tarumanagara University, Indonesia

37. Prof. Leksmono S Putranto Tarumanagara University, Indonesia

38. Dr. Adianto Tarumanagara University, Indonesia

39. Dr. Agustinus Sutanto Tarumanagara University, Indonesia

40. Dr. Danang Priatmodjo Tarumanagara University, Indonesia

41. Dr. Naniek Widayati Tarumanagara University, Indonesia

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FOREWORDS

CHAIRMAN OF THE ORGANIZING COMMITTEE

First of all let’s pray and say thanks to God for giving us His mercy and blessings.

The development of technology nowadays is growing up so fast. It aims to meet the necessary of the community to get a better life. Technological innovation which needed to develop technology products that can help people in improving their lives. Therefore the academics are not only required to implement the learning process, but also have to do research and community service to produce innovative scientific research.

Indonesian academics today are eager to involve in research activities. Therefore we required a scientific forum for mutual discussion, exchange information about the research that has been carried out especially related to Urban Engineering.

Faculty of Engineering, University of Tarumanagara conducts the second international conference to bring the academics, researchers to develop their knowledge and exchange ideas so that the researchers can improve the results of research that has been done. The conference called the 2nd_{International Conference on Engineering Tarumanagara, 2015,}

which is held on the Auditorium at the 8th_{floor of M Building, Campus I, University of}

Tarumanagara from 22 to 23 October 2015. The ICET 2015 conference theme is Urban Engineering for Future Generations. Future generations as the frontier of national development should be prepared from now on, along with the necessary infrastructure. The role of technology is to support the enhancement of the ability of future generations. This event includes to the presentation of scientific papers by keynote speakers, parallel sessions presenting papers of academics and research poster exhibition.

The more extensive the information obtained, the more knowledge that we gained. Some papers submitted by researchers and academics from different countries such as, Germany, Malaysia will enrich the science and technological development.

This conference proceedings contain the full text of all papers presented International Conference on Engineering of Tarumanagara 2015. Papers are categorized based on Engineering disciplines set by the organizing committee. Then, the presentation is divided into parallel sessions.

On this occasion I would like to thank to: Foundation of Tarumanagara, Rector of Tarumanagara University, Dean of Faculty of Engineering Tarumanagara University and Sponsors of ICET 2015, for the support and help that has been given. I also would like to thank the authors for their contributions.

Finally I would like to apologies if there are deficiencies in the activity. Thank you for all the attention.

I Wayan Sukania, S.T., M.T.

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FOREWORDS

DEAN OF FACULTY OF ENGINEERING

I would like to warmly welcome all participants of the 2nd_{International Conference on}

Engineering of Tarumanagara (ICET 2015). This conference is organized by Faculty of Engineering, Tarumanagara University. The main aim of this conference was to respond the problem related to urban engineering for future generation. As this conference was designed to gather scientists, engineers, practitioners, and industries in engineering related disciplines, I expect intense discussion will happen among them so that some brilliant ideas to be used to improve the quality of human life can be produced.

I hope this conference will create an international networking and collaborating, especially in engineering research and publication.

I would like to congratulate the organizing committee of ICET 2015, for their outstanding efforts. I would also like to express my gratitude to the sponsors for their contributions in making this conference a resounding success.

I wish the International Conference on Engineering of Tarumanagara (ICET 2015) a very useful and fruitful occasion.

Thank you for your attention and contribution.

Prof. Dr. Agustinus Purna Irawan

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SCIENTIFIC COMMITTEE

1. Dr. Harto Tanujaya Tarumanagara University, Indonesia (Chair)

2. Prof. Hui Ming Wee Chung Yuan Christian University, Taiwan

3. Prof. Satoyuki Kawano Osaka University, Japan

4. Prof. Robert Vale Victoria University of Wellington, New Zealand

5. Prof. Brenda Vale Victoria University of Wellington, New Zealand

6. Dr. Ing. A. Rugerri Toni L. Karlsruhe Institut für Technologie, Karlsruhe

Germany and Atma Jaya Catholic University of Indonesia, Indonesia

7. Dr. Sie Teng Soh Curtin University, Australia

8. Dr. Thomas Marconi Delft University of Technology (TU Delft), The

Netherlands

9. Prof. Yahaya Ahmad University of Malaya, Malaysia

10. Prof. Nasir Bin Daud University of Malaya, Malaysia

11. Prof. Mohd. Zulkifly b. Abdullah Universiti Sains Malaysia, Malaysia

12. Prof. Zaidi Mohd. Ripin Universiti Sains Malaysia, Malaysia

13. Dr. Ing. M. Razi Abdul Rahman Universiti Sains Malaysia, Malaysia

14. Dr. Ing. Joewono Prasetijo Universiti Tun Hussein Onn, Malaysia

15. Dr. Mohamed Azlan Suhot Universiti Teknologi Malaysia, Malaysia

16. Dr. Bambang K. Hadi Bandung Institute of Technology, Indonesia

17. Prof. Indarto University of Gadjah Mada, Indonesia

18. Prof. Jamasri University of Gadjah Mada, Indonesia

19. Prof. Tresna P. Soemardi University of Indonesia, Indonesia

20. Prof. I Made Kartika University of Indonesia, Indonesia

21. Prof. Danardono A. S. University of Indonesia, Indonesia

22. Prof. Eddy S. Siradj. University of Indonesia, Indonesia

23. Prof. Dr. Ir. Teuku Yuri M. Zagloel University of Indonesia, Indonesia

24. Dr. Yono Reksoprodjo University of Indonesia, Indonesia

25. Prof. Tjokorda Gde Tirta Nindhia Udayana University, Indonesia

26. Prof. Ngakan Putu Gede Suardana Udayana University, Indonesia

27. Prof. I Gusti Bagus Wijaya Kusuma Udayana University, Indonesia

28. Prof. Kuncoro Diharjo Sebelas Maret University, Indonesia

29. Prof. I Nyoman Pujawan Sepuluh November Institute of Teechnology,

Indonesia

30. Prof. Hadi Sutanto Atma Jaya Catholic University of Indonesia,

Indonesia

31. Dr. Iftikar Z. Sutalaksana Bandung Institute of Technology, Indonesia

32. Prof. Tri Harso Karyono Tanri Abeng University, Indonesia

33. Dr. Rianti Ariobimo Trisakti University, Indonesia

34. Prof. Roesdiman Soegiarso Tarumanagara University, Indonesia

35. Prof. Chaidir A. Makarim Tarumanagara University, Indonesia

36. Prof. Agustinus Purna Irawan Tarumanagara University, Indonesia

37. Prof. Leksmono S Putranto Tarumanagara University, Indonesia

38. Dr. Adianto Tarumanagara University, Indonesia

39. Dr. Agustinus Sutanto Tarumanagara University, Indonesia

40. Dr. Danang Priatmodjo Tarumanagara University, Indonesia

41. Dr. Naniek Widayati Tarumanagara University, Indonesia

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ORGANIZING COMMITTEE

Chairman I Wayan Sukania, S.T., M.T.

Vice Chairman Imma Sofi Anindyta, S.T., M.Arch.

Conference Secretariat M. Agung Saryatmo, S.T., M.M.

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PROGRAM OVERVIEW

Thursday, 22 October 2015

No Time Program

1 08.30-09.00 Registration

2 09.00-09.30 Opening Ceremony

a) Balinese Welcome Dance

b) National Anthem + Mars Tarumanagara

c) Chairman Speech

d)Opening by Vice Rector of Academics and Student Affairs, Untar

e) Photo Session (WRA, Dean, Chairman, Keynote Speakers,

Presenters, Sponsors)

3 09.30-09.40 Sponsorship Presentation

4 09.40-11.40 Keynote Speaker 1: Prof. Zaidi Mohd. Ripin

University Sain Malaysia, Malaysia Keynote Speaker 2: Ir. Irwansyah.

Industrial Estate Association of Indonesia (Himpunan Kawasan Industri) Head of Environmental and Spatial Planning

5 11.40-11.50 Appreciation to Keynote Speakers, Moderator, Sponsors)

6 11.50-12.00 Sponsorship Presentation

7 12.00-12.10 Technical Information

8 12.10-13.00 Lunch

9 13.00-15.00 Parallel Session I

10 15.00-15.30 Coffee Break

11 15.30-17.00 Parallel Session II

Friday, 23 October 2015

No Time Program

1 08.30-09.00 Registration

2 09.00-11.00 Parallel Session III

3 11.00-11.15 Closing Ceremony

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DESIGN AND CONSTRUCTION OF A PROTOTYPE OF SCREW

PRESS FOR THE COLLECTION OF COCONUT MILK

I Wayan Surata

1)

, Tjokorda Gde Tirta Nindhia

2)

, Davied Budyanto

3)

, Ahmad Eko Yulianto

4)

1)_{Department of Mechanical Engineering, Udayana University, Denpasar-80361, Indonesia} 2)

Department of Mechanical Engineering, Udayana University, Denpasar-80361, Indonesia

3,4)_{Student of Mechanical Engineering, Udayana University, Denpasar-80361, Indonesia}

e-mail: iwasura@gmail.com

Abstract

The process of cooking oil production generally starting from grated the mature coconut meat, then pressing the grated meat to obtain coconut milk, and finally heating the coconut milk to obtain the cooking oil. Pressing mechanism to obtain coconut milk is a very important step and decisive in the process of producing cooking oil. The amount of milk produced depends on the pressure applied at the time of pressing grated coconut.The higher the pressure, the more milk is obtained. Cooking oil production in the rural area is still done traditionally. Local practice of making cooking oil is by pressing the grated coconut manually by hand. Pressing by hand resulted not optimum yield of coconut milk, and also the workers feel fatigue quickly. While the mechanical pressing tools that available in the market is not efficient due to the working steps too much and take long time per cycle. To resolve this problem, power screw pressing unit for milk extraction is constructed, as the process is simple, continues, and safe. The screw press produces a compressive force in the cylinder to push and press the grated coconut until the end of the cylinder while the coconut milk and coconut dregs flows out continuously. Screw pressing of grated coconut was designed using straight shaft configuration with square profile. The ergonomics consideration is also applied in this design in order to make the operator safe and comfortable. After construction is completed then the performance test is done to investigate the actual capacity and yield of milk produced. The test results showed that screw pressing of grated coconut worked well with capacity an average of 13 kg/h and coconut milk yield of 56%.

Keywords: screw press, grated coconut, coconut milk, milk yield

INTRODUCTION

Cooking oil included in the group of nine basic commodities that generally is

needed by Indonesian community, therefore cooking oil must be available and be sold

freely in the market every day. The most important oleaginous plants for cooking oil are:

palm, sunflower, soya, corn, almond, sesame, nut, coconut, olive, etc. The production of

cooking oil from coconut as raw materials, in addition to the main results in the form

of coconut milk and cooking oil, also produced a byproduct in the form of coconut

dregs or the solid part which is a valuable source of protein for livestock feeds.

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this tool is very long and difficult for the operator, besides that working posture and

dimension of the tools are not ergonomics, cause fatigue and musculoskeletal disorders

[3,4,5,6].

Ergonomics approach must be carried out, in which the technology being used, the

organization being designed and managed, and the product being produced must be as such

planned and executed, so that the work system and products shall be humane, competitive

and sustainable [4]. Technology being used must be assessed comprehensively using six

criteria namely it must be technically, economically, social culturally and ergonomically

sound, safe energy and preserve the environment. Ergonomics application in addition to

create a working system that is humane, also shown to provide economic benefits.

Hendrick [7] stated that good ergonomics is good economics, which meant that the correct

application of ergonomics will provide higher economic returns. Specifically ergonomics

will provide several benefits, among others, (1) the use of muscle and energy more

efficient, (2) more efficient in time, (3) reduced fatigue, (4) reduced of work accidents, (5)

reduced of occupational diseases, (6) comfort and job satisfaction increases, (7) increased

efficiency, (8) increased quality of product and productivity, (9) reduced of working errors,

(10) reduced the operational costs [4,8].

The aims of this research were to design and construct a mechanical tool for

squeezing grated coconut using a power screw mechanism that rotated manually to

produce coconut milk continuously. Power screw component is a mechanism that is used

to convert rotary motion into rectilinear motion and usually transmits power. Power screw

can be applied in many equipment such as car jack to lift or lower the load, converting

rotary motion into a straight motion, and provide large compressive force on the

squeezing machine. Power screw unit is a tool that is very commonly used for oil

extraction, because the working steps are very simple, continuous, and easy to operate.

Processes and phenomena that occur during the process of pressing materials are

very complex. The necessary components to power the press are: the power required for

material transport along the pressing chamber, the power required to press the oleaginous

material, the power required to overcome the friction between the screw spire and the

material, the power required to push the material from the press through the cylinder head

[9].

The main data taken into consideration for prototype design are: the variable

auger rotational speed, the variable pressure in the barrel, the diameter of barrel, and

the diameter of the auger shaft [9]. Generally the rotational speed of a power screw for

pressing process ranges between 15-40 rpm [9,10,11,12]. The next variable is the

working pressure inside the barrel. According to Beerens [13], the final pressure in a

squeezing process of jatropha oil plants (jatropha seeds) minimum 4 MPa. Because the

grated coconut is not a grain, but very soft material then the pressure is much lower. In

this study assumed working pressure of 2 MPa.

MATERIALS AND METHOD

Power screw configuration with a straight shaft is the most common mechanism

used for press tools, because the manufacturing process is easy. The distance of the pitch

and diameter of the screw base is constant as depicted in Figure 1.

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[image:18.595.166.451.82.239.2]

Figure 1. Geometry of power screw with straight shaft

According to Sorin-Stefan

et al

. [9] press volume flow rate can be evaluated by using the

relatioan:

Q

v

= V

te

. (1 -

ԑ).n.k.60 [m

3

/h]

(1)

where:

V

te

- is the theoretical volume of the material displaced by the auger spire during a

complete rotation, in the exhaust area [m

3

]

n - auger rotative speed [rpm]

k - coefficient taking into account the material flowing back through the spire

extremities, as well as the incomplete feed with material (k = 0,2

–

0,35)

ԑ

- pressure ratio, calculated using equation

ԑ = (v

i

–

v

f

)/v

i

, with

v

i

= initial volume of the material [m

3

], and v

f

= final volume [m

3

].

The theoritical volume of the material displaced by the auger spire is calculated using the

following equation:

V

te

= (d

22

–

d

12

) (p

–

δ) [m

3

]

(2)

Where:

p - the auger spire pitch [m]

δ

- thickness of the auger spire [m]

d

2

- outer diameter of the auger spire [m]

d

1

- inner diameter of the auger spire (shaft) [m].

By replacing in equation (1) the expression of the theoretical volume given by equation

(2), it results the expression of the press volume flow rate:

Q

v

= (d

22

–

d

12

) (p

–

δ) (1

-

ԑ).n.k.60 [m

3

/h]

(3)

The yield of coconut milk is calculated by using the equation:

w

o

–

w

f

Milk yield

=

x 100%

(4)

w

o

w

o

- initial weight of grated coconut [kg]

w

f

- final weight of grated coconut [kg].

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The power screw pressing unit will be operated manually in a sitting position,

therefore the dimension should fit with anthropometrics of the operator, such as hand

wheel diameter, diameter of the handle, and utilization of hand force to rotate the screw.

Elbow height for Indonesian operator in a sitting position is 240 mm, the handheld

diameter is 48 mm [6]. Hand wheel diameter for high force is recommended between 45.7

cm to 50.8 cm, with an average hand strength 49 kg [14].

Grated coconut is smooth and slick material, therefore the friction coefficient

between grated coconut and surface of the barrel is smaller. The coefficient of friction

μ

=

0.2; pressure ratio ԑ = 0.5; backflow coefficient k = 0.35; and based on the Rumus Hitung

[image:19.595.88.519.261.513.2]

[15] are known the volume of 1 [m3] grated coconut equal with weight 352 [kg].

Illustration design of power screw for squeezing grated coconut and their components are

shown in Figure 2.

Figure 2. Prototype design of power screw pressing unit

RESULTS AND DISCUSSION

Prototype of power screw pressing unit consists of two main components, namely a

screw shaft as shown in Figure 3, and the cylinder barrel in Figure 4. The complete

assembly of the grated coconut press tool as depicted in Figure 5, where the unit operated

manually by hand.

[image:19.595.321.510.628.747.2]

[image:19.595.95.313.628.750.2]

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[image:20.595.175.435.85.329.2]

Figure 5. The grated coconut press tool

[image:20.595.86.526.431.537.2]

Performance test included actual production capacity and yield of milk produced.

The rotation of the screw shaft varied between 15 [rpm] to 25 [rpm], or an average 20

[rpm]. The milk yield calculation refers to the equation (4), and the results were presented

in Table 1.

Table 1. Performance test results

Parameter

Unit

Analysis of result

Mean

1

2

3

4

Grated coconut weight

kg

1.00

Dregs weight

kg

0.43

0.45

0.44

Time for pressing

minutes

4.50

4.55

4.45

5.02

4.63

Capacity

kg/h

13.33

13.19

13.48

11.95

13.00

Milk yield

%

57.00

55.00

56.00

The theoretical capacity was calculated in accordance with equation (3), for

rotation of 15 [rpm] the theoretical capacity Q = 8.25 [kg/h], and for rotation of 25 [rpm]

the theoretical capacity Q = 13.75 [kg/h]. Meanwhile, the test results in Table 1 shown that

the average actual capacity about 13.00 [kg/h]. This result was very satisfactory because

the experimental results were in the range of theoretical calculations.

Based on the analysis in Table 1, the milk yield was obtained an average of 56%.

This result was higher when compared to hand squeezing which the milk yield about

52.9% [16]. Likewise when compared to use a mechanical piston screw the milk yield

between 47.5 to 55% [17].

CONCLUSIONS

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ACKNOWLEDGEMENTS

The author wish to thanks the Ministry of National and Culture of The Republic of

Indonesia for financial support under scheme of Research Group grant (

Skim Penelitian Grup Riset

) for the year of 2015 granted through Udayana University, Bukit Jimbaran,

Bali, Indonesia.

REFERENCES

[1]

Palungkun, R.,

Aneka Produk Olahan Kelapa

. Bogor: Penebar Swadaya, 1992.

[2]

Rindengan, B., Novarianto, H.,

Minyak Kelapa Murni: Pembuatan dan Pemanfaatan

.

Penebar Swadaya, 2006.

[3]

Ghazali, I., Tambunan, M., Nazlina, Perancangan Alat Pemeras Kelapa Parut Menjadi

Santan dengan Cara Pengepresan Manual yang Ergonomis.

Jurnal Teknik Industri FT.USU

, 2013, Vol. 2 No. 2, p. 19-27.

[4]

Manuaba, A., Ergonomi, Kesehatan, dan Keselamatan Kerja.

Prosiding Seminar Nasional Ergonomi

. Surabaya: Guna Widya, 2000.

[5]

Grandjean, E.,

Fitting the Task to the Man, a Textbook of Occupational Ergonomics

,

Piladelphia: Taylor &Francis, 1998.

[6]

Nurmianto, E.,

Ergonomi, Konsep Dasar dan Aplikasinya

. Jakarta: Candimas

Metropole, 1996

[7]

Hendrick, H.W., 2002. Good Ergonomics is Good Economics. Proceeding

Ergonomics, International seminar on Ergonomics.

[8]

MacLeod, D. 2006. The Ergonomics Kit for General Industry, 2

nd

ed. Taylor &

Francis

[9]

Sorin-Stefan, B., Ionescu, M., Voicu, G., Ungureanu, N., Vladut, V.,

Calculus Elements for Mechanical Presses in Oil Industry

. Politehnica University of Bucharest,

Romania, 2013.

[10]

Martins, K.C.R., Silva, P.H.C., Galvao, V.L., Martins, L.S.P., Matias da, S.L.E,

Pereira, R.J.R., Development of Prototype of Screw Press for The Collection of Oil

From Seeds of Castor and Jatropha.

Brazilian Congress of Thermal Sciences and Engineering

. Uberiandia, Brazil, 2010.

[11]

Sari, P.,

Preliminary Design and Construction of A Prototype Calona Seed Oil Extraction Machine

. Thesis. The Graduate School of Natural and Applied Sciences of

Middle east Technical University, 2006.

[12]

Zheng, Y.,

Screw Pressing of Whole and Dehulled Flaxeed for Organic Oil Rich in Omega-3 Fatty Acids

. Dissertation. Nort Dakota State University of Agriculture and

Applied Science, 2003.

[13]

Beerens, P.,

Screw-pressing of Jatropha seeds for fuelling puposes in less developed countries

. Thesis. Department of Sustainable Energy Technology, Eindhopen

University of Technology, 2007.

[14]

Woodson, W.E., 1981. Human Factors Design Hand Book.

[15]

Rumus Hitung, 2013,

Tabel Massa Jenis dan Berat Jenis Berbagai Zat di Sekitar Kita.

Available at: http://rumushitung.com/2013/05 /31/tabel-massa-jenis-dan-berat-jenis/,

Diakses: 11 Juli 2015.

[16]

Winarno, F.G.,

Kelapa Pohon Kehidupan

. Jakarta: Gramedia Pustaka Utama, 2014.

[17]

Surata, I W.,

Penggunaan Roda Tangan Berhendel pada Alat Pres Parutan Kelapa

Design and Construction of A prototype of Screw Press for The Collection of Coconut Milk.

UNTAR

Sponsored by:

PT. TARUMA BHAKTI USAHA

0

International Conference on Engineering of Tarumanagara

FOREWORDS

I Wayan Sukania, S.T., M.T.

FOREWORDS

Prof. Dr. Agustinus Purna Irawan

SCIENTIFIC COMMITTEE

ORGANIZING COMMITTEE

Thursday, 22 October 2015

Friday, 23 October 2015

TABLE OF CONTENTS

Invited Papers

Paper ID Title Author/Authors pp

List of Papers - Civil Engineering

Paper ID Title/Author/Authors pp

List of Papers - Industrial Engineering

Paper ID Title/Author/Authors pp

List of Papers - Mechanical Engineering

Paper ID Title/Author/Authors pp

List of Papers - Urban Engineering

DESIGN AND CONSTRUCTION OF A PROTOTYPE OF SCREW

Abstract

INTRODUCTION

cooking oil from coconut as raw materials, in addition to the main results in the form

Ergonomics approach must be carried out, in which the technology being used, the

sound, safe energy and preserve the environment. Ergonomics application in addition to

efficient, (2) more efficient in time, (3) reduced fatigue, (4) reduced of work accidents, (5)

to convert rotary motion into rectilinear motion and usually transmits power. Power screw

Processes and phenomena that occur during the process of pressing materials are

The main data taken into consideration for prototype design are: the variable

squeezing process of jatropha oil plants (jatropha seeds) minimum 4 MPa. Because the

used for press tools, because the manufacturing process is easy. The distance of the pitch

complete rotation, in the exhaust area [m

= final volume [m

(2), it results the expression of the press volume flow rate:

wheel diameter, diameter of the handle, and utilization of hand force to rotate the screw.

between grated coconut and surface of the barrel is smaller. The coefficient of friction

Prototype of power screw pressing unit consists of two main components, namely a

The rotation of the screw shaft varied between 15 [rpm] to 25 [rpm], or an average 20

rotation of 15 [rpm] the theoretical capacity Q = 8.25 [kg/h], and for rotation of 25 [rpm]

This result was higher when compared to hand squeezing which the milk yield about

) for the year of 2015 granted through Udayana University, Bukit Jimbaran,

. Surabaya: Guna Widya, 2000.

. Politehnica University of Bucharest,

Zheng, Y.,

Diakses: 11 Juli 2015.