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PERAHU FIBERGLASS UNTUK PENUNJANG ALAT PENANGKAP IKAN DAN SEKTOR PARIWISATA DESA SUMBERASRI KECAMATAN PURWOHARJO BANYUWANGI Pambudi, Setyo; Asrofi, Mochamad; Triono, Agus; Tsabit, Mumtadz Zaid Bin; Murtadho, Nizam Alfi
SELAPARANG Jurnal Pengabdian Masyarakat Berkemajuan Vol 4, No 3 (2021): Agustus
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpmb.v4i3.5200

ABSTRAKFiberglass lebih ekonomis dibandingkan dengan kayu maupun logam untuk bahan pembuatan kapal yang berukuran kecil. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk memberikan pengetahuan tentang design kapal dan bahan pembuatan kapal berupa Fiberglass Reinforced Plastics (FRP). Pengetahuan tentang design kapal, dan pengetahuan bahan Fiberglass Reinforced Plastics (FRP) dianggap penting karena masih kurangnya pengetahuan akan hal tersebut. Pembuatan kapal berbahan fiberglass secara tidak tepat dapat mengakibatkan pengendalian kapal yang kurang maksimal. Selain itu, kekuatan lambung kapal juga tidak sesuai dengan standard. Kegiatan pengabdian ini dilakukan dengan dua tahap yaitu pelatihan dan pendampingan pembuatan kapal berbahan fiberglass. Dari hasil evaluasi didapatkan bahwa peserta memiliki keterampilan teknik hand lay-up dan pengetahuan bahan yang baik setelah diadakannya pelatihan dan pendampingan.Â Kata kunci: kapal; fiberglass; hand lay-up; nelayan; pariwisata; mangroveÂ ABSTRACTFiberglass is more economical than wood or metal for small shipbuilding materials. This community service activity aims to provide knowledge about ship design and shipbuilding materials in the form of Fiberglass Reinforced Plastics (FRP). Knowledge of ship design, and knowledge of Fiberglass Reinforced Plastics (FRP) is considered important because there is still a lack of knowledge about it. Making boats made of Fiberglass improperly can result in less than optimal ship control. In addition, the hull of the ship is also not up to standard. This service activity is carried out in two stages, namely training and mentoring in the manufacture of Fiberglass boats. From the evaluation results, it was found that of the participants had good hand lay-up technique skills and material knowledge after the training and mentoring.Â Keywords: boat; fiberglass; hand lay-up; fisherman; tourism; mangrove

Upaya mengatasi cacat produksi botol kemasan air 600 ml dengan metode Statistical Process Control Mahros Darsin; Mochamad Asrofi; Joni Anggianto; Soesatijono Soesatijono
Jurnal Litbang Industri Vol 10, No 2 (2020)
Publisher : Institution for Industrial Research and Standardization of Industry - Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24960/jli.v10i2.6139.129-137

This research aim is to find out the type of defects in production process of 600 ml bottle water at PT TIB Jember, then some attempts to resolve the problem. The p-chart of Statistical Process Control was employed. The control chart in September 2019 shown that some data beyond the ultimate control limit (UCL). The defects were categorized into three: whitening, deviate form, and broken. The Pareto chart revealed that the aforementioned defects were 59.7%, 26.36% and 15.07% respectively. By using the fishbone diagram some root cause of the defects were found. First, the unstable workplace temperature which disturbs the preform melting process prior to blowing, therefore causing whitening the bottle. Second, the heater which is often turned off while processing that caused deviate form. The frequently turned off the heater was caused by cracked-damage along with the hoses of overdue. Some suggestions were given, one of them was replacing the hoses by the new ones. The new control chart in October 2019 showed that all data within the limits following the replacement of the hose. It also reduced the rate of the defect by 0.19% from 0.74% to 0.55%.

SIFAT MEKANIK DARI BIOKOMPOSIT FILM PATI UBI KAYU DENGAN PENGUAT SERAT AKAR BUAH NAGA (HYLOCEREUS POLYRHIZUS) Melbi Mahardika; Hairul Abral; Anwar Kasim; Syukri Arief; Mochamad Asrofi
ROTOR Vol 10 No 2 (2017)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Dragon fruit root fiber used as a reinforcement in the biocomposites film of cassava starch. The production method of biocomposites film was solution casting. The cassava starch serves as the matrix in the biocomposites film. The variation of amount fiber in matrix was 2, 4 and 6% from dry starch weight basis. Isolation of dragon fruit root fiber used alkalization and bleaching process with NaOH, NaClO2 and CH3COOH, respectively. Glycerol was used as plasticizers. Mechanical properties of biocomposites was determined by tensile test. The result shows that, tensile strength increased 200% after the addition of 6% fiber compared to pure starch film. Tensile test data was supported by X-Ray Difraction (XRD). Keywords: Biocomposite, Cassava Starch, Dragon fruit root fiber, Mechanical properties, XRD.

PENGARUH TEMPERATURE, HOLDING TIME, DAN PENAMBAHAN Sn TERHADAP CACAT SHRINKAGE PADA PROSES SINTERING METAL INJECTION MOLDING AL-PP Ahmad Rendi Maulana; Danang Yudistiro; Mochamad Asrofi
ROTOR Vol 14 No 1 (2021)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Metal injection molding (MIM) is a relatively recent technological process used in the powder metallurgy industry, which is highly efficient and useful for the manufacture of large quantities of small and complex metal components. MIM consists of four basic steps consisting of mixing, injection molding, debinding, and sintering. Sintering to compact and increase the strength of metal powders and experience shrinkage (shrinkage). The purpose of this study was to determine the optimal combination of the MIM sintering process for the proportion of shrinkage defects by adding parameters Sn (%), temperature (℃), and holding time (hours). This study used an experimental design with the Taguchi method. The contribution factor obtained that the addition of the Sn parameter did not have a significant effect on the shrinkage of 14.48%, the temperature parameter had a significant effect on the shrinkage proportion of 68.92%, and the holding time parameter did not have a significant effect on the proportion of depreciation with a percentage of 6.27%. From the results, the optimal combination is the addition of Sn at level 3 (2%), the temperature at level 1 (450 ℃), and holding time at level 1 (1 hour).

ALAT SABLON UNTUK MENUNJANG TAMPILAN KEMASAN KRUPUK CUMI PADA KELOMPOK USAHA POKLAHSAR MANDIRI BANYUWANGI Mochamad Asrofi; Mochammad Edoward Ramadhan; Sujito Sujito
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 4, No 1 (2020): November
Publisher : Universitas Muhammadiyah Mataram

ABSTRAKProgram pengabdian kepada masyarakat bertujuan untuk menyelesaikan permasalahan yang dihadapi oleh mitra pengabdian yaitu kelompok usaha kecil rumahan “Poklahsar Mandiri” yang bergerak di bidang produksi kerupuk cumi. Kelompok usaha ini terletak di Desa Karangsari, Sempu, Banyuwangi. Metode pelaksaan pengabdian ini berupa studi wawancara dan observasi. Wawancara dilakukan berupa diskusi kecil tentang permasalahan kelompok mitra. Permasalahan utama yang dialami oleh mitra ini adalah kemasan plastik yang belum ada labelnya (polos). Kelompok usaha ini menginginkan adanya transfer teknologi yang berupa pembuatan alat sablon kemasan plastik untuk krupuk cumi. Selanjutnya, tim pengabdian melakukan observasi lapang untuk melihat kondisi nyata kelompok usaha ini. Alat sablon kemasan plastik berlabel diharapkan dapat menghasilkan kemasan plastik yang mempunyai daya tarik pembeli. Selain itu, sebagai akibat penjualan meningkat, kesejahteraan kelompok usaha kecil ini dapat terwujud. Sebagai informasi bahwa jumlah produksi kerupuk cumi dari kelompok usaha ini rata-rata per tahunnya 850 kg per tahunnya (harga per kg 40.000). Dengan adanya alat sablon diharapkan ongkos produksi dapat diminimalkan serta penjualan kerupuk cumi meningkat dikarenakan kemasan yang menarik. Hal tersebut diindikasikan peningkatan penjualan kerupuk cumi yang semula 850 kg menjadi 1000 kg per tahunnya. Kata kunci: alat sablon; kemasan plastik; kerupuk cumi; poklahsar mandiri. ABSTRACTThe community service program aims to solve the problems faced by community service partners, namely the small home business group "Poklahsar Mandiri" which is engaged in the production of squid crackers. This business group was located in Karangsari Village, Sempu, Banyuwangi. The method of implementing this service is in the form of interview and observation studies. Interviews were conducted in the form of small discussions about the problems of the partner group. The main problem experienced by these partners is plastic packaging that has no label (plain). This business group wants a technology transfer in the form of making screen printing plastic packaging tools for squid crackers. Furthermore, the community service team conducted field observations to see the real condition of this business group. This labeled plastic packaging screen printing tool is expected to produce plastic packaging that has a buyer appeal. In addition, as a result of increased sales, the welfare of this small business group can be realized. For information, the amount of squid cracker production from this business group averages 850 kg per year (price per kg 40,000). With the screen printing equipment, it is hoped that production costs can be minimized and sales of squid crackers will increase due to the attractive packaging. This is indicated by an increase in sales of squid crackers from 850 kg to 1000 kg per year. Keywords: screen printing equipment; plastic packaging; squid crackers; poklahsar mandiri.

Pengaruh jarak susun lapisan penguat Komposit Serat Daun Nanas / Termoplastik pada Pembentukan Delaminasi Zul Nain; Ismet Hari Mulyadi; Mochamad Asrofi
INOVTEK POLBENG Vol 10, No 1 (2020): INOVTEK VOL. 10 N0 1
Publisher : POLITEKNIK NEGERI BENGKALIS

Penelitian ini bertujuan untuk mengetahui pengaruh posisi jarak serat penguat dalam laminasi komposit pada pembentukan delaminasi. jarak serat penguat yang dipilih adalah 1 mm, 2 mm dan 3 mm dalam laminasi komposit dari matriks polimer etilen vinil asetat (EVA) dengan serat penguat dari daun nanas. Metode yang digunakan dalam fabrikasi komposit adalah hand lay-up, yaitu dengan pengecoran langsung pada tiga lapisan serat yang telah dianyam dan diikat ke sisi cetakan. Untuk kecepatan potong, Vf 144 mm / min, menggunakan pahat bor berdiameter 4 mm dengan sudut pahat 70o. Delaminasi ditentukan dengan metode Feda. Bagian delaminasi diamati menggunakan mikroskop digital dan kemudian diproses menggunakan AutoCAD untuk mengukur Dmax dan Ad. Rasio delaminasi pada lubang atas untuk jarak 1 mm, 2 mm dan 3 mm masing-masing adalah 1,417, 1,362 dan 1,324 untuk lubang bawah adalah 1,114, 1,098 dan 1,076. Kata kunci: Delaminasi; komposit laminasi; etilena vinil asetat; serat daun nanas; proses penggurdian.

Aplikasi Serat Alam Muntingia calabura sebagai Pengisi dalam Biokomposit Bermatriks Polivinil Alkohol (PVA): Karakteristik Sifat Kuat Tarik dan Permukaan Patahan Melbi Mahardika; Mochamad Asrofi; Afril Priyanto; Yuni Hermawan; Salahuddin Junus; Santoso Mulyadi; Sujito Sujito; Devita Amelia
Agroteknika Vol 4 No 1 (2021): Juni 2021
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32530/agroteknika.v4i1.103

Pemanfaatan serat alam Muntingia calabura sebagai pengisi bahan biokomposit belum dimanfaatkan secara optimal. Penggunaan serat alam ini memiliki potensi yang baik sebagai bahan pengisi biokomposit. Tujuan penelitian ini adalah untuk mengetahui pengaruh volume fraksi serat terhadap kekuatan tarik dan permukaan patahan biokomposit Polivinil Alkohol (PVA) dan Muntingia calabura. Volume fraksi serat di dalam PVA divariasikan 0%, 2%, 4%, 6% dan 8% (dari berat kering PVA). Pembuatan biokomposit menggunakan metode penuangan larutan gelatin. Biokomposit dikeringkan dalam suhu 70 ᵒC selama 12 jam. Setelah itu, spesimen biokomposit dipotong sesuai standar American Society for Testing and Materials (ASTM) D882-18. Hasil pengujian tarik menunjukkan bahwa peningkatan volume fraksi serat di dalam PVA mengakibatkan penurunan kekuatan tarik. Nilai kuat tarik tertinggi terdapat pada spesimen film PVA murni adalah 6,8 MPa. Penambahan serat sebesar 2% menyebabkan penurunan sebesar 14,7% dari nilai kuat tarik film PVA. Fenomena tersebut juga terjadi pada penambahan serat 4 – 8% di dalam matriks PVA. Hal tersebut didukung oleh pengataman Scanning Electron Microscope (SEM) yang menunjukkan adanya penggumpalan serat di dalam matriks.

Upaya mengatasi cacat produksi botol kemasan air 600 ml dengan metode Statistical Process Control Mahros Darsin; Mochamad Asrofi; Joni Anggianto; Soesatijono Soesatijono
Jurnal Litbang Industri Vol 10, No 2 (2020)
Publisher : Institution for Industrial Research and Standardization of Industry - Padang

This research aim is to find out the type of defects in production process of 600 ml bottle water at PT TIB Jember, then some attempts to resolve the problem. The p-chart of Statistical Process Control was employed. The control chart in September 2019 shown that some data beyond the ultimate control limit (UCL). The defects were categorized into three: whitening, deviate form, and broken. The Pareto chart revealed that the aforementioned defects were 59.7%, 26.36% and 15.07% respectively. By using the fishbone diagram some root cause of the defects were found. First, the unstable workplace temperature which disturbs the preform melting process prior to blowing, therefore causing whitening the bottle. Second, the heater which is often turned off while processing that caused deviate form. The frequently turned off the heater was caused by cracked-damage along with the hoses of overdue. Some suggestions were given, one of them was replacing the hoses by the new ones. The new control chart in October 2019 showed that all data within the limits following the replacement of the hose. It also reduced the rate of the defect by 0.19% from 0.74% to 0.55%.

PENGARUH ARUS PLASMA DAN LAJU ALIRAN GAS PADA MESIN DC THERMAL PLASMA TERHADAP KARAKTERISTIK PARTIKEL NANO Zno Dedi Dwilaksana; Prayogo Alim Pangestu; Andi Sanata; Sumarji .; Mochamad Asrofi; Mahros Darsin; R. Puranggo Ganjar Widityo
STATOR: Jurnal Ilmiah Teknik Mesin Vol 5 No 1 (2022): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar

Nanopartikel adalah partikel yang berskala nanometer atau 10-9. Dalam penelitian ini nanopartikel ZnO berhasil terproses dengan metode DC Thermal Plasma, ukuran partikel yang dihasilkan cukup bagus. Kombinasi plasma sangat mempengaruhi morfologi nanopartikel, proses yang terjadi hanya memerlukan sangat singkat. Dimulai dari serbuk Zn yang didorong untuk masuk ke dalam arc plasma dan terjadi proses liquid, oxidation and kristalin. Ukuran kristal yang dihasilkan untuk puncak hkl tertinggi dimulai dari 42-50nm. Parameter kisi kristal yang diperoleh adalah a= 0,2610347nm dan c= 0,782935. Struktur kristal yang dihasilkan adalah hexagonal dan space group P63MC.

Metal Oxides as Soluble Nano Catalyst on Biodiesel: A Review Setyo Pambudi; Agus Triono; Mochamad Asrofi; Iid Mufaidah; Yeni Variyana; R. A. Ilyas
Journal of Applied Agricultural Science and Technology Vol. 5 No. 2 (2021): Journal of Applied Agricultural Science and Technology
Publisher : Green Engineering Society

Nano particles of metal oxide developed as soluble nano additive in liquid fuels to improve fuel quality. One application of nano metal oxide particles is an additive to biodiesel. Biodiesel is an alternative fuel that can reduce dependence on fossil fuels. Pure biodiesel has a relatively lower calorific value compared to fossil fuels. Low calorific value results in increased brake specific fuel consumption. Moreover, biodiesel has a higher density and viscosity compared to fossil fuel. The content of carbon monoxide (CO), unburned hydrocarbons (HC) and nitrogen oxide (NOx) in exhaust gases with biodiesel is higher than fossil fuels. Metal oxide nanoparticles are added to biodiesel between 6 to 80 nm with concentrations about 50 to 500 ppm. Addition of metal oxide nanoparticles to biodiesel can improve brake thermal efficiency, reduce brake specific fuel consumption, carbon monoxide (CO), unburned hydrocarbons (HC), nitrogen oxide (NOx) and improve carbon dioxide (CO2) emission due to the catalytic effect of metal oxide nanoparticles. Metal oxide acts as an oxidation catalyst thereby reduce the carbon combustion activation temperature and thus enhances hydrocarbon oxidation, promoting complete combustion. Nanoparticles that are often used in various studies are nickel (II) oxide (NiO), cerium (IV) oxide (CeO2), titanium oxide (TiO2), zinc oxide (ZnO), aluminum oxide (Al2O3), and silicon dioxide (SiO2). This review paper describes the progress and development of nano metal oxide applications as additives for biodiesel, and the discussion in this paper is divided into 3 main topics, including the effects of nanoparticles on the properties of biodiesel, engine performance, and emission characteristics.

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