Totok Suwanda
Universitas Muhammadiyah Yogyakarta

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Perancangan Injection Blowing Tools dengan Line Slider untuk Mesin Blow Molding dengan Kapasitas Volume 300 Ml

JMPM : Jurnal Material dan Proses Manufaktur Vol 2, No 1 (2018): JUNI 2018
Publisher : JMPM : Jurnal Material dan Proses Manufaktur

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Abstract

Blow molding machine is a machine that used to produced plastic bottle with injection air system to blowing the soft preform (±100℃)  at 7 bar pressure of air. They are two main components in injection blowing tools i.e, injection tools to distribute the high pressure air from compressor to the bottle preform and the line sliders to make a mold cavity can moving when the injection process ongoing and finished. To build the injection blowing tools, they are several main material that use, on the line sliders use the main material of low carbon steel type A36 ( 0,25% - 0,29% C) with strip and plate with force of 360 Ksi ( 250 MPa ), and the injection tools use the main material of Aluminium-alloy 4032 (Al, Si 12,5%, Mg, Cu, Ni) because it easy to make an model or profil with reasonable price. The main material on the shafts holder injector and blow pin use stainless steel 304 with max force of 515 MPa. The process to joint between the components are applying the welding model with fillet type and average on high of the neck weld 3 mm and use electrodes of RD-260 which E6013 electrode class with maximum strength 60 Ksi and use the bolt and nuts which average from material of SS 304 with size M6 - M16. In  the process injection, the ratio of large development due to the process injection ( BUR ) is 4 with the size of a bottle preform long 99 mm thick 2 mm and diameter 26 mm.

PENGARUH SISTEM SEKOLAH SEHARI PENUH (FULL DAY SCHOOL) TERHADAP PRESTASI AKADEMIK SISWA SMP JATI AGUNG SIDOARJO

Kajian Moral dan Kewarganegaraan Vol 2, No 2 (2014): Edisi yudisium 2
Publisher : UNESA

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Abstract

Abstrak Lembaga pendidikan sebagai lembaga yang dapat menciptakan generasi muda yang bisa maju dan berkembang dimana generasi muda dapat bertahan dalam kehidupan nyata melalui pendidikan. Banyak sekali usaha-usaha yang dilakukan oleh lembaga-lembaga pemerintah maupun swasta dengan menerapkan sistem yang dirasa sesuai untuk mewujudkan pendidikan yang berkualitas. Salah satu diantaranya adalah sistem Full Day School. Full Day School sendiri terdiri dari 3 kata yaitu Full yang artinya penuh, Day yang artinya hari dan School yang berartinya sekolah. Jadi Full Day School adalah kegiatan sehari penuh di sekolah. Penelitian ini bertujuan untuk (1) Mengetahui adakah pengaruh sistem Full Day School yang ada pada SMP Jati Agung Sidoarjo terhadap Prestasi akademik siswa SMP Jati Agung Sidoarjo, (2) Faktor-faktor apa yang mempengaruhi sistem Full Day School terhadap prestasi akademik siswa SMP Jati Agung Sidoarjo.Data pada penelitian ini diperoleh dengan cara penyebaran Angket, Wawancara, Dokumentasi serta Observasi. Hasil data pada penelitian ini akan dianalisis dengan menggunakan metode Statistik Inferensial dengan memakai rumus Regresi Linier.Hasil Penelitian Menunjukkan bahwa (1) sistem Full Day School berpengaruh signifikan terhadap prestasi akademik siswa SMP Jati Agung Sidoarjo (2) Full Day School akan mampu mempengaruhi prestasi akademik siswa jika sekolah menyesuaikan sarana dan prasarana yang disesuaikan dengan kebutuhan siswa, kurikulum, kreatifitas guru maupun keadaan siswa. Kata Kunci: Full Day School, Prestasi Akademik Abstract Educational institutions is viewed as an institution that can create a younger generation that can thrive and flourish where young people can survive in real life through education. Lots of efforts undertaken by government agencies and private sector by implementing a system that is deemed appropiate to achieve quality education. On of them is the Full Day School system. Full Day School consists of 3 words are Full of meaning Full, which means the Day and the day School which meant the School. So, Full Day School is a full day of activities at school.This study aims to ( 1 ) determine the effect of the system is there a Full Day Junior High School, which is on the Great Teak Sidoarjo to junior high student academic achievement Teak Supreme Sidoarjo , ( 2 ) what factors affect the system Full Day School to the junior high school students academic achievement Teak Court Sidoarjo.The data obtained in this study by distributing questionnaire , interviews , documentation and observation . The results of the data in this study will be analyzed using inferential statistics methods using linear regression formula .Research indicates that ( 1 ) Full Day School systems have a significant effect on student achievement Supreme Sidoarjo junior Teak ( 2 ) Full Day School will be able to influence the academic performance of students if the school adjust infrastructure tailored to the needs of students , curriculum , and teacher creativity state students . Keywords : Full Day School , Academic Achievement

Kajian Komprehensif Pengaruh Perlakuan Alkali Terhadap Kekuatan Komposit Berpenguat Serat Nanas-Nanasan (Bromeliaceae)

Jurnal Semesta Teknika Vol 9, No 2 (2006): NOVEMBER 2006
Publisher : Jurnal Semesta Teknika

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Abstract

Penelitian ini bertujuan untuk menyelidiki pengaruh perlakuan alkali (5% NaOH) terhadap sifat tarik (tegangan, regangan, modulus elastisitas) bahan komposit berpenguat serat nanas-nanasan (bromiliaceae) dengan matrik unsaturated polyester. Karakteristik penampang patahan diselidiki dengan pengamatan menggunakan foto makro. Bahan utama penelitian adalah serat nanas-nanasan kontinyu, NaOH, dan resin unsaturated polyester. Serat yang digunakan dikenai perlakuan alkali (5% NaOH) selama 0, 2, 4, 6, dan 8 jam. Pembuatan komposit dengan metode cetak tekan pada kisaran fraksi massa serat 15% - 50. Pembuatan spesimen uji komposit dan prosedur pengujiannya mengacu pada standar ASTM D 638. Hasil penelitian menunjukkan bahwa perlakuan alkali (5% NaOH) mampu menghilangkan lapisan seperti lilin di permukaan serat sehingga serat dan resin memiliki ikatan (mechanical bonding) yang kuat. Komposit yang diperkuat serat yang dikenai perlakuan alkali memiliki kekuatan yang lebih tinggi dibandingkan dengan komposit yang diperkuat serat tanpa perlakuan.  Semakin tinggi fraksi massa serat (Wf)  maka kekuatan tariknya juga semakin besar. Pada di atas 30%, kekuatan tarik paling besar terjadi pada komposit yang diperkuat serat dengan perendaman alkali selama 4 jam, dan selanjutnya disusul oleh komposit yang diperkuat serat dengan perendaman alkali selama 2 jam pada (Wf). Komposit yang diperkuat serat perlakuan alkali selama 4 dan 2 jam juga memiliki modulus elastisitas yang lebih tinggi, yaitu masing-masing 40.71 GPa dan 50.65 GPa pada Wf sekitar 38%. Jenis patahan splitting in multiple area terjadi pada komposit yang diperkuat serat dengan perlakuan NaOH selama 4 jam, 2 jam, dan tanpa perlakuan. Namun, komposit yang diperkuat serat dengan perlakuan NaOH selama 8 jam memiliki jenis patahan patah tunggal. Berhubung penampang patahan komposit yang diperkuat serat tanpa perlakuan mempunyai mekanisme kegagalan fiber full out, maka kekuatan komposit ini pun menjadi rendah karena memiliki ikatan antara serat dan matrik yang lemah.

Pengaruh Perlakuan Alkali terhadap Kekuatan Bending Komposit Berpenguat Serat Rami dengan Matrik Polyester

Jurnal Semesta Teknika Vol 13, No 2 (2010): NOVEMBER 2010
Publisher : Jurnal Semesta Teknika

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Abstract

The objective of this study was to determine the influence of alkali treatment on the flexural strength and failure mode of jute fiber waste/polyester composite materials. The materials being used in this research werewaste of jute fibers, polyester resin, where as NaOH and aquades were utilised for alcali treatment. Prior to being embedded into polyester resin to produce composite boards employing press printing techniques (press mold), the fiber was alkalitreated for 0, 2, 4 and 6 hours by soaking into a 28% volume NaOH content solution. Flexural test was carried out in accorcance with the ASTM D790 standard, and macrographs of selected fracture surfaces of the specimens were capturedfor analysis in oerder to determine the characteristics of the fracture surfaces. Test results showed that the longer the alcali treatment time in the lower the flexural stress and strain, but the the higher the flexural modulus. The composite without alkali treatment reluted in 70.39 MPa bending stress, 1.85% bending failure strain, and 3.85 GPa bending modulus, whereas the 6 hours of alkali treatment resulted in 51.70 MPa bending stress, 1.27% bending failure strain, and 4.13 GPa bending modulus. Composite with alkali-treatmed fiberdid not exhibite any fiber pull out, and also experienced debonding due to shear forces can’t afford retained by the resin.

Optimalisasi Tekanan Kompaksi, Temperatur Dan Waktu Sintering Terhadap Kekerasan Dan Berat Jenis Aluminium Pada Proses Pencetakan Dengan Metalurgi Serbuk

Jurnal Semesta Teknika Vol 9, No 2 (2006): NOVEMBER 2006
Publisher : Jurnal Semesta Teknika

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Abstract

Powder metallurgy is one of the manufacturing processes. Upon the process, melting process is not necessary to carry out. The powder is subsequently compacted then sintered. These processes can be conducted either separately or simultaneously.  However metallurgy processes have not been commonly developed in Indonesia yet. Therefore it is necessary to carry out preliminary research that serves as a basis for developing of further process. The effect of the independent variables of the process on mechanical and physical properties of the product will be examined. The research was conducted by arranging the independent variables which consist of pressure, temperature and sintering period whereas hardness and density of product are the dependent variables.  Aluminum will be water atomized for obtaining the powder. Response surface method is used as the experimental design method.  The method can show the effect of the independent variables individually and the interaction among the variables. Data analysis will result mathematic formula showing the functional relation. The research concludes that 170 MPa compaction pressure and 500 0C sintering temperature and 40 to 50 minutes range period of sintering produces the maximum Brinell hardness number of 47 BHN. On the other hand, the effect of the independent variables to the density has not been able to be formulated. 

Pengaruh Fraksi Volume Serat terhadap Peningkatan Kekuatan Impak Komposit Berpenguat Serat Nanas-Nanasan (Bromeliaceae) Kontinyu Searah dengan Matrik Unsaturated Polyester

Jurnal Semesta Teknika Vol 13, No 2 (2010): NOVEMBER 2010
Publisher : Jurnal Semesta Teknika

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Abstract

The objective of this research is to determine the effect of fiber volume fraction and alcali (5% NaOH solution) treatment on the impact strength and failure mode of continuous bromeliaceae fiber/BQTN 157 polyester composites. Specimens being tested were produced using press mold technique. Fiber volume fraction was varied from 20% to 40%, while the the soaking time of the alcali treatment was between 2 and 8 hours. Whilst the impact test was carried out in accordance with the ASTM D5941 standard, the micro-structures of the broken specimens were presented as photo macrographs. The result showed that failure energy was sharply increase, 0.22 J (69.23%), upto fiber volume fraction of 34,44%. Further increase of fiber content resulted in decreasing slope of the failure energy increase. The corresponding impact strength was found being 0,0046 J/mm2. The effect of soaking time of the alcali treatment on the failure energy and impact strength showed similar trend. Optimum result was obtained at 6 hours of soaking time, i.e. 0,27 J of failure energy and 0,0055 J/mm2 of impact strength. Eight hours of soaking time resulted in the damage of fiber surface leading to decrease of failure energy and impact srength of the resulted composites. Hinge break showing fiber pull out was observed in the failure surfaces of various fiber contents, with the increase of soaking time resulted in decrease of the amount of pulled-out fibers.

Pengaruh Sudut Water Sprayer Dan Tekanan Air Dalam Sprayer Pump Terhadap Hasil Serbuk Alumunium Pada Proses Atomisasi Air

Jurnal Semesta Teknika Vol 9, No 2 (2006): NOVEMBER 2006
Publisher : Jurnal Semesta Teknika

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Abstract

Metalurgi serbuk merupakan metode pembuatan benda-benda logam dengan menggunakan serbuk logam sebagai bahan dasar. Proses dalam teknologi metalurgi serbuk terdiri dari pembentukan serbuk, compacting, sintering dan finishing. Salah satu metode dalam pembuatan serbuk logam adalah dengan metode atomisasi air. Pembuatan serbuk dengan metode atomisasi air terdapat beberapa faktor yang mempengaruhi antara lain: sudut α (sudut tumbukan antara melting dengan butir air) dan tekanan air saat tumbukan. Penelitian ini bertujuan untuk mengetahui pengaruh sudut α, dan tekanan air terhadap optimalisasi hasil pembuatan serbuk dengan metode atomisasi air dan bentuk serbuk yang diamati dengan foto mikro. Proses pembuatan serbuk menggunakan metode atomisasi air dengan variabel bebasnya adalah sudut α yang ditentukan 30o, 40o, 50o dan 60o dan variasi tekanan air,  yaitu 25 kg/cm2, 30 kg/cm2, 35 kg/cm2 dan 40 kg/cm2. Bahan yang digunakan dalam proses atomisasi air adalah alumunium. Dalam penelitian ini diperoleh hasil bahwa sudut α dan tekanan tumbukan air pada melting mempengaruhi hasil produksi serbuk dengan metode atomisasi air. Hasil penelitian dengan variasi sudut α  diperoleh bahwa sudut  α = 30o menghasilkan produk 2,7%, sudut  α = 40o menghasilkan produk 4,05%, sudut α = 50o menghasilkan produk 3,23%, sudut α = 60o menghasilkan produk 1,8%. Penelitian dengan variasi tekanan air pada tekanan 20kg/cm2 tidak diperoleh serbuk, 25 kg/cm2diperoleh 2,9%, tekanan 30 kg/cm2 diperoleh 3,2%, tekanan 35kg/cm2 diperoleh 4,5% dan tekanan 40kg/cm2 diperoleh 2,9%. Hasil serbuk alumunium optimum secara teoritis dihasilkan pada sudut α 42,50 dan tekanan air 33,17 kg/cm2. Bentuk serbuk hasil proses atomisasi air sebagian besar adalah irregular, accicular dan flake.