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Rancang Bangun Mesin Pencacah Plastik Tipe Gunting Anggraeni, Nuha Desi; Latief, Alfan Ekajati
Jurnal Rekayasa Hijau Vol 2, No 2 (2018)
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat Institut Teknologi Nasional

ABSTRAKJumlah sampah plastik yang dibuang kelaut oleh Indonesia jumlahnya mendekati 200 juta ton. Jumlah ini berada di bawah Tiongkok yang menghasilkan sampah plastik mencapai 262,9 juta ton. Pada saat yang sama, kebutuhan akan plastik di Indonesia baru terpenuhi sekitar 64% dari total 5 juta ton plastik. Sampah plastik yang dibuang kelaut, seharusnya dapat dimanfaatkan untuk memenuhi kebutuhan tersebut. Sampah plastik yang telah ada, perlu diolah agar dapat dimanfaatkan kembali sebagai plastik produksi. Pengolahan sampah plastik yang paling sederhana adalah dengan mencacah plastik yang telah ada menjadi serpihan-serpihan kecil menggunakan mesin pencacah. Mesin pencacah dapat digunakan dimanapun karena menggunakan mesin diesel sebagai penggeraknya. Mekanisme pencacahan yang digunakan menggunakan tipe gunting. Hasil perancangan mesin pencacah menggunakan 5 mata pisau dengan spesifikasi, panjang 180 mm, lebar 50 mm, tebal 10 mm dan sudut mata pisau 35° dengan panjang poros penggerak 450 mm, diameter 30 mm.Kata kunci:plastik, mesin, daur ulang.ABSTRACTThe amount of plastic waste discharged into the sea by Indonesia is approximately 200 million tons. This amount is below China which produces plastic waste reaches 262.9 million tons. At the same time, the need for plastics in Indonesia is only fulfilled about 64% of the total 5 million tons of plastic. Plastic waste discharged into the sea, should be utilized to meet these needs. Plastic waste that has been there, needs to be processed in order to be reused as a production plastic. The simplest plastic waste processing is to chop the already existing plastic into small pieces. This chopper machine can be used anywhere because it uses a diesel engine as its propulsion. The enumeration mechanism used with scissor type. The design of the enumerator machine uses 5 blades with specifications, length of 180 mm, width 50 mm, 10 mm thick and 35 ° knife angle with 450 mm drive length, 30 mm diameter.Keyword: plastic, machine, recycle

Optimasi Dimensi Connecting Rod Al2024 dan Tulangan Baja 4340 pada Kawasaki Ninja 150 R Menggunakan ANSYS Latief, Alfan Ekajati; Anggraeni, Nuha Desi
Jurnal Rekayasa Hijau Vol 3, No 1 (2019)
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat Institut Teknologi Nasional

ABSTRAKConnecting rod berfungsi menghubungkan piston ke crankshaft, sistem ini membentuk mekanisme sederhana yang mengubah gerak lurus menjadi gerak melingkar ataupun sebaliknya. Umumnya connecting rod dirancang berbenruk I agar kuat dan ringan dengan material baja. Pengurangan massa pada connecting rod dapat mengurangi momen inersia engine, meningkatkan performa dan fuel efficiency engine. Penelitian ini bertujuan untuk mendapatkan dimensi optimum connecting road menggunakan material Al 2024 dan tulangan baja 4340.Dimensi optimum harus dapat menahan tegangan dan regangan maksimum yang terjadi pada connecting rod ketika menerima beban tekan dan tarik. Penelitian dilakukan dengan melakukan varisi dimensi profil I dan bentuk tulangan dengan dimensi lain menyesuaikan spesifikasi connecting rod Kawasaki Ninja 150 R. Hasil penelitian memperlihatkan bahwa connecting rod dengan profil I, bentuk tulangan webbing merupakan tulangan paling optimal dengan ketebalan 8 mm dengan berat total 0,12 Kg.Kata kunci: connecting rod, tulangan baja, Al2024, ANSYSABSTRACTThe connecting rod serves to connect the piston to the crankshaft; this system forms a simple mechanism that converts straight motion into circular motion or vice versa. Generally, connecting rods are designed to be made in order to be strong and lightweight with steel material. Reducing the mass of the connecting rod can reduce the moment of engine inertia, improve the performance and fuel efficiency engine. This study aims to obtain the optimum dimensions of the connecting road using Al 2024 material and steel reinforcement 4340. The optimum dimension must be able to withstand the maximum stress and strain that occurs in the connecting rod when receiving compressive and tensile loads. The study was conducted by varying the dimensions of profile I and shape of reinforcement with other dimensions adjusting the specifications of the connecting rod Kawasaki Ninja 150 R. The results showed that the connecting rod with profile I, the form of webbing reinforcement was the most optimal reinforcement with a thickness of 8 mm and total mass 0,12 kg.Keywords: connecting rod, reinforcement steel, Al2024, ANSYS.

Modifikasi Mesin Pencacah Plastik PET Tipe Gunting dengan Kapasitas 50 kg/jam Nuha Desi Anggraeni; Alfan Ekajati Latief; Alvin Rhamdani; Robby Rinaldi Sandi
Jurnal Rekayasa Energi dan Mekanika Vol 1, No 2 (2021): JREM
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/JREM.v1i2.72

Abstrak Mesin pencacah plastik merupakan sebuah mesin yang dirancang untuk mencacah sampah plastik agar mengurangi volume sampah. Mesin pencacah dirancang mampu mencacah sampah dengan kapasitas pencacahan 50 kg/jam, hasil analisa kinerja mesin pencacah memperlihatkan bahwa kapasitas mesin pencacah adalah 36.68 kg. Analisis kinerja mesin lain adalah: efisiensi mesin nilainya 73,37 %; tingkat kebisingan mencapai 80,6 dB; getaran yang dihasilkan saat melakukan pencacahan adalah 4,9 mm/s2, dan rendemen cacahan 73,45 %. Hasil analisa kinerja memperlihatkan bawah mesin pencacah perlu dimodifikasi agar sesuai dengan hasil perancangan awal. Modifikasi dilakukan dengan mengubah saringan, mengatur ulang jarak antara mata pisau, dan menambahkan pisau pada pisau putar. Modifikasi yang dilakukan berhasil meningkatkan kapasitas mesin pencacah menjadi 42,59 kg/jam; tingkat kebisingan menjadi 76,8 dB; tingkat getaran mesin 3,84 mm/s2; dan kualitas hasil cacahan menjadi baik yaitu plastik terpotong. Kata kunci: modifikasi, kinerja, sampah, daur ulang, mata pisau Abstract The plastic chopping machine is a machine designed to chop plastic waste in order to reduce the volume of waste. The chopping machine is designed to be able to chop waste with a chopping capacity of 50 kg / hour, the results of the chopping machine performance analysis show that the chopping machine capacity is 36.68 kg. Other engine performance analyzes are: the engine efficiency is 73.37%; noise level reaches 80.6 dB; The vibration generated during the counting was 4.9 mm / s2, and the chopping yield was 73.45%. The results of the performance analysis show that the chopping machine needs to be modified to match the results of the initial design. Modifications were made by changing the filter, resetting the distance between the blades, and adding blades to the rotary knife. The modifications made were successful in increasing the capacity of the chopping machine to 42.59 kg / hour; noise level to 76.8 dB; machine vibration level 3.84 mm / s2; and the quality of the chopped results is good, namely the plastic is cut. Key words: modification, performance, waste, recycling, blade

Pengaruh Teknik Tempa Lipat Terhadap Perubahan Sifat Mekanik Material AISI O1 Pada Pembuatan Pisau Tanto Alfan Ekajati Latief; Syahril Sayuti; Rakean Wide Windujati
Jurnal Rekayasa Energi dan Mekanika Vol 1, No 1 (2021): JREM
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/JREM.v1i1.51

ABSTRAKTanto merupakan senjata tajam yang berasal dari Jepang dan merupakan senjata kedua bagi para Samurai di Jepang. Tanto biasa terbuat dari baja karbon menengah hingga baja karbon tinggi yang. Material baja yang digunakan untuk pembuatan Tanto dalam penelitian ini adalah baja AISI seri O1 karena memiliki karakteristik sifat mampu bentuk yang baik serat dapat dikuatkan melalui proses heat treatment. Material baja ini dibuat dengan proses tempa lipat dengan variasi tempa empat lipatan dan satu lipatan. Pembuatan Tanto dan spesimen uji dilakukan dengan proses tempa lipat secara konvensional menggunakan tungku arang, dengan temperatur tempa rata-rata yaitu ±1200oC, kemudian dilanjutkan dengan quenching pada temperatur ± 850oC, serta tempering pada temperatur ±250oC. Penelitian ditujukan untuk mengetahui pengaruh dari proses tempa empat lipatan dan tempa satu lipatan terhadap sifat mekanik, yaitu kekerasan dan kekuatan impak serta untuk melihat perubahan pada struktur mikro. Hasil pengujian menunjukkan bahwa nilai kekerasan paling tinggi sebesar41HRC yang dimiliki oleh pada raw material, ,sedangkan nilai impak paling tinggi sebesar 224,02 Joule/cm² ayng dicapai oleh material dengan proses tempa empat lipatan, Fasa akhir yang ditemukan pada baja tempa empat lipatan adalah bainit dan martensit, sementara perlit dan ferit ditemukan pada baja satu lipatan, dan lath martensit ditemukan pada pada raw material Kata kunci: Pisau Tanto, Tempa lipat ,Quenching, Tempering, Uji Impak ABSTRACT Tanto is a sharp weapon originating from Japan and is the second weapon for Samurai in Japan. Tanto is usually made of medium carbon steel to high carbon steel. The material which is used in this research is AISI O1 series steel because of its high ability to be formed and also can be made tough through a heat treatment process. This steel is made by folding forge process, with variation in number of folding, which is 4 folds and 1 fold. The making of Tanto and test specimens was carried out by conventional fold forging processes by using a charcoal furnace, with an average forging temperature at ± 1200oC, continue with quenching at ± 850oC, and tempering at ± 250oC. The research is carried out in order to determine the effect of the four-folds forging and one-fold forging to the mechanical behavior, which are hardness and impact strength, and also to see change in its micro structure. The test that have been carried out shows that the highest hardness value of 41 HRC owned by raw material, while the highest impact value of 224.02 Joules / cm² obtained by material with four layer forging process. Final phases that found in the four-fold forged steel are bainite and martensite, pearlite and ferrite found in one-fold forged steel. and lath martensite in found in the raw material. Keywords: Tanto Knife, Folding Forging, Quenching, Tempering, Testing, Impact Tests

Perancangan Bracket Cetakan dan Simulasi Injection Molding untuk Komponen Slide Piece CVT Muhammad Khaidar Rachman; Alfan Ekajati Latief; Naufal Raihan M; Satria Budhi Dharma
Jurnal Rekayasa Energi dan Mekanika Vol 2, No 1 (2022): JREM
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/JREM.v2i1.74

ABTRAK Sepeda motor adalah moda transportasi ter-favorit di masyarakat, dimana jumlahnya mencapai 106.657.952 unit atau sekitar 84 persen dari total kendaraan di Indonesia khusunya sepeda motor dengan automatic transmission. Hal ini berbanding lurus dengan banyaknya pengembangan atau penelitian di industri otomotif salah satunya yaitu pemanfaatan polypropilane high impact (PPHI) dan serat alam sebagai material atau bahan dasar sebuah produk. Oleh karena itu, dalam penelitian ini dirancang bracket cetakan yang merupakan pengembangan dari cetakan injection molding hand press sebelumnya. Penelitian ini bertujuan agar slide piece dapat diproduksi secara masal. Dalam penelitian ini dilakukan simulasi injection molding untuk slide piece berserat nanas dengan fraksi volume 20%, mesh 170 dengan perekat berupa polypropilane high impact (PPHI), melalui tahapan-tahapan perancangan, seperti penentuan kriteria kebutuhan, simulasi pembebanan, penentuan material, serta anilisis hasil simulasi. Hasil dari perancangan adalah gambar teknik bracket cetakan yang menggunakan material AL 7075 T-7 serta parameter proses injection molding dari hasil simulasi berupa temperatur proses yang disarankan dari 180°C hingga 200°C dengan tekanan sebesar24 MPa hingga 30 MPa. Kata kunci: 3-5 ; Slide piece, Injection molding, Serat Nanas, polypropilane high impact (PPHI). ABSTRACT Motorcycles are the most popular mode of transportation in the community, where the number reaches 106,657,952 units or about 84 percent of the total vehicles in Indonesia, especially motorcycles with automatic transmission. This is directly proportional to the number of developments or researches in the automotive industry, one of which is the use of high impact polypropylene (PPHI) and natural fibers as the basic material for a product. Therefore, in this study, a mold bracket was designed which is a development of the previous hand press injection molding mold. This study aims to make slide pieces mass-produced. In this study, injection molding simulations were carried out for pineapple fibrous slide pieces with a volume fraction of 20%, mesh 170 with an adhesive in the form of high impact polypropylene (PPHI), through design stages, such as determining requirement criteria, loading simulation, determining material, and analyzing results. simulation. The results of the design are technical drawings of mold brackets using AL 7075 T-7 material and the injection molding process parameters from the simulation results in the form of a recommended process temperature from 180°C to 200°C with a pressure of 24 MPa to 30 MPa. Key words: 3-5;Slide piece, Injection molding, Pineapple Fiber, polypropilane high impact (PPHI).

Proses Pembuatan Mesin Injection Molding Hand-Press untuk Plastik Komposit Alfan Ekajati Latief; Nuha Desi Anggraeni; Wildhan Rhamdani
METAL: Jurnal Sistem Mekanik dan Termal Vol 4, No 2 (2020): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Injection molding is a method of forming thermoplastic material that is melted due to heating. The heating result is then injected by the nozzle into the mold until the thermoplastic material hardens. Plastic processing using injection molding is used to produce strong thermoplastic material quickly. The manufacture of injection molding machine hand-press is expected to help the process of plastic processing that demands material engineering and manufacturing technology. Research in the process of making injection molding machine hand-press aims to determine the manufacturing process time and temperature when the operation of injection molding hand-press. The process of making injection molding hand-press shows that the required time is 612 minutes, while in theory the time is 565.3 minutes. The operating temperature is (230-260) °C, with an optimum temperature of 250 °C.

Perancangan Cetakan Injection Molding Hand Press Untuk Produk Slide Piece CVT Menggunakan FEM Alfan Ekajati Latief; Lutfi Darusman; Wibowo Pria Fahla; Ahmad Dzilfairuz Zaidan; Nuha Desi Anggraeni
METAL: Jurnal Sistem Mekanik dan Termal Vol 5, No 2 (2021): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

The development of composite materials in the automotive industry has reached the stage of utilizing natural fibers to pursue relatively low material prices with the same quality. One method for product formation is injection molding. This study aims to design the most efficient mold from a variety of shapes, dimensions, and runner types used with the help of SolidWorks software. The tool used to support the design of the mold is a low-pressure injection molding hand press with a barrel temperature specification of 200 C - 250 C, barrel volume of 270 cm3, and an out-of-nozzle diameter of 8 mm. The most efficient design is determined from three multi-cavity models with different shapes. This research produces a two-plate mold with multi-cavity modeling which has a low-pressure parameter of 1.89 MPa and the shrinkage factor is still within the standard range of PPHI material (< 1%).

Pembuatan dan Pengujian Karakteristik Pisau Sangkur Menggunakan Metoda Tempa Lipat Twisting Alfan Ekajati Latief; Tri Sigit Purwanto; Pikri Ilham Jauhari; M. Diaz Fajar Ismail
Jurnal Rekayasa Energi dan Mekanika Vol 2, No 2 (2022): JREM
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/JREM.v2i2.139

ABSTRAK Pisau sangkur/bayonet pertama kali dibuat di negara Francis di kota Bayonne pada abad ke 17. Kegunaan dari pisau tersebut dapat diletakkan di ujung senapan untuk pertempuran jarak dekat.Material yang dipilih untuk pembuatan pisau sangkur yaitu baja C45 dan baja komersil. Untuk proses pembuatan baja C45 ditumpuk dengan baja komersil lalu di tempa lipat dan dilakukan proses puntir (twisting) agar mendapatkan struktur mikro yang khas dengan keseragaman padatan pada semua bidang yang ditempa, hal tersebut dilakukan sebanyak 3x lipatan hingga mencapai 27 lapisan, dilipat kembali sebanyak 3x lipatan sehingga hasil akhinya didapat 81 lapisan.Penelitian ini bertujuan untuk membuat pisau sangkur dengan karakteristik menyerupai pedang damascus, hasil dari pengujian kekerasan setelah dirata-ratakan didapat 18 HRC, untuk pengujian metalografi didapat fasa ferit dan perlit, dan pada pengujian fungsi berupa menyayat memotong menebas dan menusuk kondisi pisau sangkur masih dalam kondisi baik. Kata kunci : Pisau Sangkur, Twisting, Tempa Lipat, C45, Uji kekerasan, Uji metalografi. ABSTRACT Sangkur knife/bayonet knife was first made in the franciscan state of the city of Bayonne in the 17th century. The usefulness of such a knife can be put on the tip of a rifle for close combat. The materials chosen for the manufacture of the knife are C45 steel and commercial steel. For the C45 steelmaking process, it is stacked with commercial steel and then forged and a twisting process is carried out in order to get a distinctive microstructure with uniformity of solids on all forged fields, this is done as many as 3x folds until it reaches 27 layers, folded back as many as 3x folds so that the results are obtained 81 layers. This study aims to make a cage knife with characteristics resembling a Damascus sword, the results of hardness testing after being averaged obtained 18 HRC, for metallographic testing obtained ferrite and perlite phases, and in testing functions in the form of wrenching, cutting, slashing and piercing the condition of the knife is still in good condition. Key words : Bayonet Knife, Twisting, Folding Forge, C45, Hardness test, Metallographic test.

Manufacture of Composite Plastic Pellet Seed Machine Capacity 2.5 Kg/Hour Alfan Ekajati Latief; Cahyadi Suheri
METAL: Jurnal Sistem Mekanik dan Termal Vol 7, No 1 (2023): Jurnal Sistem Mekanik dan Termal (METAL)
Publisher : Department of Mechanical Engineering, Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/metal.7.1.34-39.2023

Natural fibers are a material that is easily obtained from nature, both animals and plants. Using natural fibers has been commercially applied in various fields, such as automotive and construction, by mixing PPHI (Polypropylene High Impact) with injection molding and forming plastic pellets. Pellets are extruded with natural pineapple fiber for composite, which requires a composite pellet-making machine, which combines two materials that are not aligned with the material mixing method using a screw inside the barrel, then heated by a heater. The screw pushes the pellets that have been mixed and melted to the die and then dried with water, which will go to the Crusher to be chopped into composite pellet seeds. In this research, a plastic extruder machine with a capacity of 2.5 Kg/hour components used a single screw, heater, die, Crusher, barrel, and hopper, and the time delay in this study is 165º and 180º. The screw rotation is constant at 15 rpm, using a screw diameter of 20 mm x 550 mm and a pitch distance of 1D with an inclination angle of 23º.

Aplikasi Dan Pengaruh Sistem Turbocharger Berkapasitas 100cc – 200cc Pada Performa Mesin Yamaha V-Ixion Tri Sigit Purwanto; Alfan Ekajati Latief; Muhammad Azis Mahardhika; Kurnia Hendriawan; Jaka Rahmadi
Jurnal Rekayasa Energi dan Mekanika Vol 3, No 1 (2023): JREM
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/JREM.v3i1.54

ABSTRAK Dunia otomotif di Indonesia semakin berkembang dengan pesat, jenis-jenis motor baru dari berbagai pabrikan bermunculan dengan pesat. Salah satu jenis motor yang berteknologi cukup baik adalah YAMAHA V-IXION. Tipe motor ini memiliki teknologi dasar mobil yaitu injector bahan bakar dan ECU (Electronic Controller Unit) sebagai penerapan engine mapping. Untuk menambah tenaga motor, dilakukan pemasangan turbocharger. Tujuan penelitian ini adalah meningkatkan performa mesin dengan kapasitas 150 cc dengan memanfaatkan boost dari turbocharger dengan tekanan minimal 0,3 bar. Performa mesin diukur dengan menggunakan dyno test. Setelah sistem turbocharger diaplikasikan ke mesin YAMAHA V-IXION dapat bekerja secara normal dan mampu mencapai boost hingga 0,5 bar. Hasil pengujian dyno test diperoleh: Peak daya terjadi pada 8,622 rpm dengan daya sebesar 14,7 HP, peak torsi terjadi pada 8,547 rpm dengan torsi sebesar 12,21 Nm2, dan konsumsi bahan bakar yang dipergunakan adalah 2,63 liter dengan jarak tempuh 94,6 Km. Kata kunci : V-IXION, turbocharger, dyno test ABSTRACT The automotive in Indonesia is growing rapidly, new types of motorcycle from various manufacturers have emerged rapidly. One type of motorcycle with good technology is the YAMAHA V-IXION. This type of motorcycle has basic car engine technology, namely fuel injectors and ECU (Electronic Controller Unit) as engine mapping application. To increase power, it is necessary to install a turbocharger so that motorcycle power generated can increase. The goal of this research is increase the machine performance with capacity of 150 cc by using boost from turbocharger that operate at least 0.3 bar. Machine performance was tested by using dyno test rig. After the turbocharger system is applied to the YAMAHA V-IXION engine it can work normally and is able to achieve a boost of up to 0.5 bar. The dyno test result: Peak power occurs at 8.622 rpm with a power of 14.7 HP, peak torque occurs at 8.547 rpm with torque of 12.21 Nm2, and fuel consumption used is 2.63 liters with a distance of 94.6 km. Key words: V-IXION, turbocharger, dyno test.

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