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Analisis pengaruh variasi ukuran impeler pengaduk terhadap kekerasan, kekuatan bending dan densitas aluminium matrix composite (AMC) dengan metode stir casting Okta Kurniawan Andryanto; Teguh Triyono; Agung Tri Wijayanta
Jurnal Teknik Mesin Indonesia Vol 15 No 2 (2020): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v15i2.172

Perkembangan sains dan teknologi di dunia industri, khususnya manufaktur di Indonesia saat ini membutuhkan jenis material terbaru. Aluminium matrix composite (AMC) adalah salah satu dari banyak jenis teknologi metode komposit yang digunakan. Pada stir casting, ukuran dari impeler pengaduk adalah salah satu parameter yang mempengaruhi hasil dari pengecoran. Kajian ini bertujuan untuk menentukan pengaruh dari ukuran impeler pengaduk pada kekerasan, kekuatan bending dan densitas dari komposit. Proses pembuatan aluminium matrix composite menggunakan metode stir casting dengan variasi pada ukuran impeler pengaduk yakni 90, 100 dan 110 mm. Kecepatan pengadukan yakni 400 rpm selama 5 menit pada suhu semi-solid. Fraksi volume dari pasir silika yang digunakan adalah 9% dan penambahan Magnesium dengan fraksi volume sebesar 2,5% dan 725oC untuk suhu pengecoran. Semakin besar ukuran impeler pengaduk akan menyebabkan penguatan partikel terpusatkan di tengah dan menggumpal di bawah pengaduk. Gumpalan tersebut menyebabkan penguatan partikel tidak terdistribusi secara merata, sehingga kekuatan mekanik akan berkurang. Nilai tertinggi didapatkan pada uji kekerasan, bending dan densitas pada ukuran impeler pengaduk sebesar 90 mm (90,87 HBN, 205,44 MPa dan 2,67 g/cm3).

Analisis pengaruh penambahan Mg terhadap kekuatan impak dan konduktivitas termal pada paduan AlSi dengan metode stir casting Abdunnashir Dhiya'uddin; Teguh Triyono; Eko Surojo
Jurnal Teknik Mesin Indonesia Vol 15 No 2 (2020): Jurnal Teknik Mesin Indonesia
Publisher : Badan Kerja Sama Teknik Mesin Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36289/jtmi.v15i2.171

Stir Casting merupakan salah satu metode pembuatan material logam dalam kondisi cair (liquid state) yang paling sederhana. Prinsip dari proses stir casting adalah penyatuan partikel penguat ke dalam logam cair dengan pengadukan secara mekanik, lalu dituangkan ke dalam cetakan. Kajian ini bertujuan untuk mengetahui apakah ada pengaruh penambahan Mg terhadap sifat mekanik dan fisik material paduan Aluminium Silikon berbasis remelting piston bekas. Sifat mekanik dianalisis melalui pengujian kekuatan impak, sedangkan sifat fisik diamati melalui konduktivitas termal. Variasi penambahan Mg yang digunakan yaitu 1%, 1,5%, 2% dan 2,5%. Kecepatan putar stir yang digunakan yakni 400 rpm pada temperatur 650oC, temperatur tuang yang digunakan adalah 725oC. Hasil pengujian kekuatan impak, nilai yang didapatkan menurun pada setiap variasi penambahan Mg. Nilai impak terkecil diperoleh pada variasi Mg 2,5% sebesar 0,049 J/mm2, sedangkan nilai optimal kekuatan impak diperoleh pada variasi tanpa Mg (kontrol) yakni sebesar 0,133 J/mm2. Hasil pengujian konduktivitas termal dipengaruhi oleh tingkat porositas bahan. Nilai optimal pengujian konduktivitas termal diperoleh pada variasi tanpa Mg (kontrol) sebesar 27,41 W/mK dan sedangkan untuk nilai konduktivitas termal terendah diperoleh pada variasi Mg 2,5% sebesar 7,95 W/mK.

PENERAPAN TEKNOLOGI TEPAT GUNA SEBAGAI PENINGKATAN KAPASITAS MESIN PENGAYAK PASIR TIPE ROTARY DAN USAHA DUSUN TANGGALAN, KABUPATEN KARANGANYAR Catur Harsito; Aditya Muhammad Nur; Ari Prasetyo; Teguh Triyono; Rendy Adhi Rachmanto; Budi Santoso
Jurnal Kewirausahaan dan Bisnis Vol 26, No 1 (2021): June
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jkb.v26i1.44734

The increasing of infrastructure development causing in increased demand for sand material. On the other hand, the sand still contains many other components such as gravel. The size of good sand according to the Indonesian National Standard (SNI - 03-247-2002) is natural or artificial sand produced by the stone crusher industry with the largest grain size of 5 mm. On the other hand, the lack of infrastructure of the Tanggalan vilage and the small income of the village has resulted in an uneven distribution of the regional economy. Youths and heads of the Tanggalan village see the potential to increase the village's income by making sieving businesses and providing good quality building sand. The manual sieving process takes longer, so it has an impact on the development process as well as from an economic point of view on the long construction costs. So, it is necessary to have a rotary type automatic sieving machine that has a function to separate fine sand grains or according to the criteria requested by consumers with gravel. Rotary type sieving machine with a capacity of 10 m3/hour, so it is expected to meet the demand and accelerating development process. In addition, with this tool, hamlet businesses can be formed to increase hamlet income.Key words: Business, Enhancement, National Standard, Rotary, Sand Sieve.

Design manufacturing mesin pengaduk adonan roti Catur Harsito; Ari Prasetyo; Teguh Triyono; Anugrah Akbar; Bimantoro Rachmawan Suseno; Eki Rovianto; Hammar Ilham Akbar
Jurnal Litbang Industri Vol 12, No 1 (2022)
Publisher : Institution for Industrial Research and Standardization of Industry - Padang

Currently, bread is one of the alternative staple foods that is quite in demand by the public. This has resulted in the bread making industry being enthusiastically welcomed by business people because it has bright and open opportunities for large and small scales. However, the Micro, Small and Medium Enterprises (MSMEs) industry is unable to compete. One of them is because of the use of technology in the dough kneading process. This article discusses product planning for a horizontal type of bread dough mixer using the Design for Manufacturing and Assembly (DFMA) method and Quality Function Deployment (QFD) analysis where the design is based on design, materials, analysis, and equipment and manufacturing process planning. In this study, the Action Research method, engineering engineering and the Solidwork simulation design software were used. The design of the machine can be used for a stirring capacity of 10 kg and a rotation speed of 40 rpm. The results of the design consist of several main parts, namely the main frame, container, stirrer, motor, and transmission system

Design manufacturing mesin pengaduk adonan roti Catur Harsito; Ari Prasetyo; Teguh Triyono; Anugrah Akbar; Bimantoro Rachmawan Suseno; Eki Rovianto; Hammar Ilham Akbar
Jurnal Litbang Industri Vol 12, No 1 (2022)
Publisher : Institution for Industrial Research and Standardization of Industry - Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24960/jli.v12i1.7136.7-14

Currently, bread is one of the alternative staple foods that is quite in demand by the public. This has resulted in the bread making industry being enthusiastically welcomed by business people because it has bright and open opportunities for large and small scales. However, the Micro, Small and Medium Enterprises (MSMEs) industry is unable to compete. One of them is because of the use of technology in the dough kneading process. This article discusses product planning for a horizontal type of bread dough mixer using the Design for Manufacturing and Assembly (DFMA) method and Quality Function Deployment (QFD) analysis where the design is based on design, materials, analysis, and equipment and manufacturing process planning. In this study, the Action Research method, engineering engineering and the Solidwork simulation design software were used. The design of the machine can be used for a stirring capacity of 10 kg and a rotation speed of 40 rpm. The results of the design consist of several main parts, namely the main frame, container, stirrer, motor, and transmission system

The Effect of Stirrer Depth And Electroless Coating of Hardness And Tensile Strength in Aluminium Matrix Composite AL6061-AL2O3 Sukma Andini; Eko Surojo; Teguh Triyono
Mekanika: Majalah Ilmiah Mekanika Vol 20, No 1 (2021): MEKANIKA: Majalah Ilmiah Mekanika
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/mekanika.v20i1.48073

Metal matrix composite (MMC) are composite materials that are widely used in the industrial sector. Examples of metal matrix composites are Al6061 as matrix alloys and Al2O3 as reinforcement. In general, making Al6061-Al2O3 composites using the stir casting method. The stirring parameter in the stir casting affects the physical and mechanical properties of the composites. The physical and mechanical properties of composites can be improved by increasing the wettability of the reinforcement. This research was conducted to determine the effect of the depth of stirring and electroless coating treatment on the hardness and tensile strength of Al6061-Al2O3 composites. The process of making composites with Al2O3 reinforcing particles with 6% weight fraction mixed with aluminum alloys and 2.5% magnesium powder as a wetting agent. Variations of this study were the depth of the stirrer and electroless coating treatment. The depths of stirring used for the experiment were 30%, 45%, and 60% of the height of the fluid. The testing phases in this study were the density and porosity test, metallographic observation, hardness test, and tensile test. The most efficient variation of the mixer depth was obtained at a mixer depth of 30% of the fluid height. The highest hardness and tensile strength test results are hardness value of 72.43 HBN and tensile strength of 182.19 MPa with electroless coating reinforcement treatment

PENGARUH TEMPERATUR KALSINASI TERHADAP SIFAT MEKANIK MATERIAL SCAFFOLD HIDROKSIAPATIT DARI TULANG KAMBING Setiawan Eka Prawira; Joko Triyono; Teguh Triyono
Mekanika: Majalah Ilmiah Mekanika Vol 18, No 1 (2019): MEKANIKA: Majalah Ilmiah Mekanika
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/mekanika.v18i1.35042

In this study, a preliminary study on the preparation of hydroxyapatite (HAp) as bone filler was made from sheep femur bone by calcination method. The femur of the sheep is cut into a form of scaffold with dimensions of 5 mm x 5 mm x 5 mm. The calcination process is performed at four variations of temperature (700oC, 900oC, 1100oC, 1300oC). Characterization of scaffold material done before and after calcination process, it intended to find out the influence and relationship between calcination of temperature on the mechanical properties of SHA material. The results of hardness testing show that the higher calcination temperature then the SHA material hardness value also increased. The optimum hardness value occurs at 1100oC calcination temperature of 38.23±0.985VHN. Meanwhile, high calcination temperature will also decrease the compressive strength of SHA material. The value of the optimum compressive strength is achieved at 1100oC calcination temperature of 2.23±0.249 MPa. The morphology of SHA scaffold was analyzed by Scanning Electronic Microscopy (SEM). The observation of SEM shows the occurrence of porous interconnections in all temperature variations. SEM analysis results show that porous interconnect is formed at all temperature variations with diameter size ± 100-500μm. Very high calcination temperature will give the impact of HAp wall is getting thinner and the porous diameter is getting bigger. Porous interconnection damage is also seen at 1300°C which causes the mechanical properties of SHA to decrease.

Red Blood Cell Alloimmunization among the Transfusion Recipients at Sanglah General Hospital, Denpasar, Bali: A Preliminary Study Sianny Herawati; Usi Sukorini; Teguh Triyono
Journal of Global Pharma Technology Volume 10 Issue 07: (2018) July 2018
Publisher : Journal of Global Pharma Technology

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

Background Red blood cell (RBC) alloimmunization is the formation of alloantibodies among the recipientswhich is related to the frequency of antigen-positive blood transfusion received by the recipient. The difficultyto obtain compatible RBC and a higher risk of hemolytic transfusion reactions due to alloimmunizationbecome a challenge in clinical practice. Objectives: This study aims to analyze the characteristics of RBCalloantibodies in the recipient following transfusion at Sanglah General Hospital, Bali, as a preliminary study.Methods A cross sectional study was conducted among 40 recipients with a history of RBC transfusion atleast 3 times and willing to participate in this study from December 2016 to March 2017 at Sanglah General Hospital. Data were analyzed using SPSS ver. 16 software to determine the prevalence of study. Resultsmost recipients were 46 – 65 years (55%). In addition, most recipients were caused by hematology disorder (57.5%), female (52.5%), and O-Rhesus D positive (52.5%). RBC alloantibodies detected in 5% of recipients,all of them were multiple alloantibodies, such as anti-K antibodies (5%), anti-Kp a (5%), anti-E (2.5%), anti-C w(2.5%), anti-Lu a (2.5%) and anti-M (2.5%). Those alloantibodies only found in 46 – 65 years age group.Conclusion the first preliminary study regarding RBC alloimmunization in Bali was found contributed by anti-K,anti Kp a , anti-E, anti-C w , anti-Lu a , and anti-M. The results suggest that erythrocyte antigen phenotypes can beperformed further, particularly the Kell antigen to prevent alloimmunization. However, future studies withbigger samples are needed to determine the incidence of RBCalloimmunization among transfusion recipients in Bali.Keywords: Alloimmunization, Red blood cells, Transfusion recipients.

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