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Adhiharto, Riky
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Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences

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Analisis Parameter Cetakan Injeksi Plastik Menggunakan Simulasi CAE untuk Memprediksi Kegagalan Produk Front Cover MiFUS® Media, Riona Ihsan; Adhiharto, Riky; Erlangga, Yuliar Yasin; Friyadi, Muhammad Firman
Jurnal Rekayasa Mesin Vol 17, No 2 (2022): Volume 17, Nomor 2, Agustus 2022
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v17i2.3210

Abstract

Kualitas produk yang dihasilkan menjadi tantangan utama dalam perancangan cetakan injeksi plastik. Untuk mencapai hal tersebut, simulasi CAE terhadap parameter-parameter perancangan dikaji untuk membantu memprediksi kemungkinan terjadi kegagalan produk. Upaya penggunaan CAE dilakukan untuk mendapatkan hasil yang mendekati nilai sebenarnya. Namun, kendala yang dihadapi adalah pengguna CAE relatif masih sangat minim dikarenakan perlunya pengetahuan yang cukup dalam pengoperasiannya serta masih dilakukannya proses trial and error dilapangan. Oleh karena itu, paper ini dibuat bertujuan memprediksi kegagalan produk dan mendapatkan parameter optimal pada mesin injeksi menggunakan analisis simulasi CAE. Metode penelitian dilakukan mulai dari pembuatan model CAD 3D, penentuan parameter perancangan, proses simulasi, dan intepretasi hasil analisis simulasi. Produk front cover MiFUS® dijadikan sebagai bahan kajian produk plastik dengan material polyprophylene. Mesin injeksi yang digunakan adalah Demag Ergotech 200-840. Sedangkan jenis cetakan yang digunakan adalah two plate mold dengan metode pendinginan sistem delapan kanal sejajar. Intepretasi hasil analisis didapatkan waktu pengisian plastik selama 0,144 detik dan tekanan injeksi 44,98 Mpa. Sedangkan untuk distribusi kegagalan yang terjadi meliputi weld line angle terbesar yang terjadi pada sudut 144,98 dan sink mark terbesar yang terjadi pada dimensi produk yaitu 0,0361 mm sehingga dapat disimpulkan, produk casing yang akan dihasilkan dengan menggunakan parameter dari hasil analisis simulasi dapat digunakan sebagai prediksi awal sebelum diproduksi oleh mesin injeksi sebenarnya.
Perancangan Ulang dan Analisa Mesin Benchtop Injection Molding dengan Metode VDI 2222 Adhiharto, Riky; Nusantoro, Adel Bangun; Komara, Asep Indra; Wigenaputra, Dadan Heryada
JTRM (Jurnal Teknologi dan Rekayasa Manufaktur) Vol 5 No 2 (2023): Volume: 5 | Nomor: 2 | Oktober 2023
Publisher : Pusat Penelitian, Pengembangan, dan Pemberdayaan Masyarakat (P4M) Politeknik Manufaktur Bandung (Polman Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.48182/jtrm.v5i2.148

Abstract

Injection molding is a process by which plastic is heated until it softens to fill a closed mold and form a product. One of them is the benchtop injection molder, where the machine that was previously made at POLMAN had problems, namely the main frame structure and injection mechanism which was less sturdy during the injection process and the heating system which overheated. Based on these problems, a redesign and analysis was carried out on the existing benchtop injection molder machine. The design methodology used is VDI 2222, which is a technical concept design methodology suitable for product development. Heat Transfer Simulation on existing and latest designs using COMSOL Software with geometry, material, temperature, fluid inlet and outlet, and mesh parameters. The results obtained were uneven heat distribution to the middle of the existing barrel at a temperature of 4600K, while the new barrel had an even heat distribution to the middle at 4730K at the 10th second. The latest machine weighs 17.78 kg, dimensions 775 x 266 x 426 mm, barrel capacity 19 grams with an aluminum frame and tight band heater installation.
Perancangan Mesin Pembuat Chips dan Pereduksi Kandungan Kalsium Oksalat pada Umbi Porang Pratiwi, Widya Prapti; Adhiharto, Riky; Abdurrahman, Muhammad Ilham
JTRM (Jurnal Teknologi dan Rekayasa Manufaktur) Vol 6 No 2 (2024): Volume: 6 | Nomor: 2 | Oktober 2024
Publisher : Pusat Penelitian, Pengembangan, dan Pemberdayaan Masyarakat (P4M) Politeknik Manufaktur Bandung (Polman Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.48182/jtrm.v6i2.177

Abstract

The main constraint in porang processing are porang chips thickness uniformity and high calcium oxalate content. There are three stages of porang processing are washing, slicing, and boiling. The machine designed in this research combining the function of three machines : washing machine, slicer, and boiler. First, porang roots is placed into the hopper, then porang is cleaned using rotating washing brush with the translational movement of the screw conveyor. After that, porang is sliced and boiled in NaCl solution to reduce its calcium oxalate content. This research uses VDI 2222 design methodology including planning, conceptualizing, designing, and finishing. The design and validation process of critical components is carried out using CAE (Computer Aided Engineering) software. After going through the design process, a machine design was produced with a production capacity of 500 kg/hour.
ANALISIS KEGAGALAN POROS ROLL PADA MESIN PELET KAYU DENGAN METODE REDESIGN IMRC Adhiharto, Riky; Rahmi, Meri; Hakim, Adies Rahman; Rafiq, M. Wildan A.
Jurnal Teknologi Terapan Vol 11, No 1 (2025): Jurnal Teknologi Terapan
Publisher : P3M Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/jtt.v11i1.665

Abstract

The wood pellet machine is one of the Special Purpose Machines (SPM) that has an important element as a driver. One of the damaged machine elements is the broken roll shaft due to long-term use. The roll shaft functions to hold the roll so that it does not rotate during the wood pelletizing process. Failure analysis was carried out on the roll shaft, starting with a redesign using the IMRC method. The stages of this method are incremental, elemental, and radical stages. The redesign strategy chosen was an incremental redesign. This redesign changes the core component but does not change the mechanism or function. The results obtained after the redesign, obtained changes in the dimensions of the roll shaft so that it does not break with a value above the permitted control value. The largest shaft diameter becomes 70 mm, the diameter at the critical part becomes 60 mm and the length of the spline construction becomes 50 mm. With this change in diameter, a safety factor for the shaft was obtained after the redesign with a value of 6.83 and is categorized as safe.
ANALYSIS OF THE CUTTING BLADE FOR HDPE AND PET PLASTIC BOTTLE SHREDDERS FOR 3D PRINTING FILAMENT EXTRUSION Adhiharto, Riky; Mandayusdi , Cahya Ramdan Putra; Rahmi, Meri
Jurnal Rekayasa Mesin Vol. 16 No. 2 (2025)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v16i2.1950

Abstract

The increasing use of filaments for 3D printing encourages the use of suitable plastic waste as a raw material for filaments. In Indonesia, plastic waste will reach 26.2 million tons in 2023, with 18.47% of it being plastic. To process plastic waste such as PET (Polyethylene Terephthalate) and HDPE (High Density Polyethylene) into filaments, maximum size of shredding is 2 mm. This study aims to design a plastic shredding machine using the VDI 2222 (Verein Deutscher Ingenieure) method. This machine is powered by an AC electric motor that rotates a pulley to drive the blade, using a shredder and granulator cutting type. This machine is expected to be able to shred PET and HDPE plastic with a thickness of 0.3–2 mm. The results of the study are in the form of a plastic shredding machine design with dimensions of 1682 x 898 x 791 mm.
Co-Authors Abdurrahman, Muhammad Ilham Asep Indra Komara Dadan Heryada Wigenaputra Erlangga, Yuliar Yasin Friyadi, Muhammad Firman Hakim, Adies Rahman Mandayusdi , Cahya Ramdan Putra Nusantoro, Adel Bangun Pratiwi, Widya Prapti Rafiq, M. Wildan A. Rahmi, Meri Riona Ihsan Media