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All Journal REKAYASA Jurnal Rekayasa Material, Manufaktur & Energi Jurnal Inotera FLUIDA Jurnal Teknologi Equilibrium Journal of Chemical Engineering Quimica : Jurnal Kimia Sains dan Terapan Dedikasi: Jurnal Pengabdian kepada Masyarakat Jurnal Teknik Kimia dan Lingkungan Jurnal Pengabdian Masyarakat Bangsa Journal of Community Services in Sustainability Journal Serambi Engineering (JSE)
Melyna, Ella
Politeknik STMI Jakarta
Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Sosialisasi Hasil Analisis Overall Equipment Effectiveness (OEE) dan Six Big Losses Dalam Implementasi Total Productive Maintenance (TPM) Di PT ABC Suyatmo, Reviana Inda Dwi; Melyna, Ella; Arina, Herlin; Shelia, Asri Octavilyanni
Jurnal Pengabdian Masyarakat Bangsa Vol. 1 No. 10 (2023): Desember
Publisher : Amirul Bangun Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59837/jpmba.v1i10.542

Abstract

PT. ABC adalah perusahaan yang bergerak di bidang plastik yang memproduksi sparepart otomotif. Sebagian besar produk plastik yang dihasilkan dibuat menggunakan mesin injection molding dengan produk yang sangat bervariasi Sehingga, apabila terjadi kerusakan maka akan menyebabkan produksi tidak bisa berjalan sebagaimana semestinya. Tujuan kegiatan ini adalah menganalisis OEE dan six big losses dalam implementasi TPM pada mesin injection molding. Metode ini merupakan bagian utama dari sistem pemeliharaan yang banyak diterapkan oleh perusahaaan Jepang dan memiliki peranan penting dalam menekan biaya produksi, meningkatkan produktivitas, dan efisiensi mesin. Berdasarkan hasil analisis data-data yang sudah dikumpulkan melalui laporan harian produksi mesin injection molding 3 dengan produk X selama bulan Mei s.d Juli 2023, diperoleh hasil bahwa nilai OEE mesin tersebut secara umum sudah baik. Namun, hanya pada beberapa waktu saja, nilai OEEnya sangat kurang. Untuk six big losses, losses terbesar ada pada Idle and Minor Stoppages Losses, Reduce Speed Losses, dan Equipment Failure Losses. Hasil ini kemudian disampaikan dalam sosialisasi pada perwakilan perusahaan. Kemudian, diberikan rekomendasi untuk meningkatkan preventive maintenance dan 5S pada mesin injection molding 3. Dilakukan pula pengisian kuesioner peningkatan keberdayaan mitra kepada perwakilan perusahaan. Dari hasil kuesioner diperoleh nilai sedang untuk sebelum pelaksanaan kegiatan dan nilai tinggi setelah dilakukan kegiatan ini.
Pengaruh Penambahan Serat Kulit Jagung Terhadap Sifat Mekanik Komposit High Density Polyethylene (HDPE) dengan Aluminium Oksida (Al2O3) dan Maleat Anhidrida (MAH) sebagai Coupling Agent Herlin Arina; Melyna, Ella; Salsabila, Shafiyah
Jurnal Inotera Vol. 9 No. 2 (2024): July - December 2024
Publisher : LPPM Politeknik Aceh Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31572/inotera.Vol9.Iss2.2024.ID356

Abstract

The application of composites is widely used in the automotive field. HDPE, a versatile polymer, is frequently employed as a composite matrix, combining with other materials to produce unique mechanical properties and characteristics. Its widespread application in the automotive sector includes the manufacturing of bumpers and car interiors, where its distinct properties enhance the overall performance and functionality of these components. Corn husk fiber waste is a natural material that has not been utilized properly, so the use of corn husk fiber as reinforcement in composites is an alternative to waste problems in the environment. Aluminum Oxide (Al2O3) as a filler with another name alumina, possesses strong tensile strength and thermal stability, and it is anticipated to lower production costs while enhancing composites' mechanical qualities. Maleic anhydride (MAH), a coupling agent, is applied to the matrix, reinforcement, and filler to increase their adherence. The manufacture of HDPE matrix composite with the addition of corn husk fiber and MAH is expected to improve the mechanical properties of the composite. The composition of HDPE: corn husk fiber (%wt) is 90:0, 85:5, and 80:10, as well as the composition of 5%wt alumina and 5%wt MAH in each sample. Making composite pellets using a compounder, making composite sheets by hot press method using a manual forming machine. Tensile strength and hardness measurements were taken to evaluate material performance. Tensile strength testing was carried out using a Universal Testing Machine (UTM), crystallinity testing using Differential Scanning Calorimetry (DSC) and testing using Near-Infrared (NIR). The tensile strength test results obtained the highest tensile strength value in the composition of HDPE: corn husk fiber 90: 0%wt of 17.67 MPa. The crystallinity test results obtained the highest degree of crystallinity in the composition of HDPE: corn husk fiber 90: 0%wt of 67.88%. The incorporation of corn husk fibers into the composite material significantly affects its mechanical properties, particularly the tensile strength and crystallinity, with higher fiber content leading to a notable reduction in these properties. SEM testing was also carried out to determine the morphological shape of the composite.
Optimization of Polypropylene Composites for Automotive Applications: The Role of Carbon Fiber and Aluminum Oxide Melyna, Ella; Muhammad Fadhillah Ansyari; Vina Kusuma Wardani
Jurnal Serambi Engineering Vol. 10 No. 2 (2025): April 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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

Abstract

The development of lightweight yet mechanically strong materials is crucial for automotive components. This study investigates the effects of carbon fibre (CF) and aluminium oxide (Al₂O₃) as fillers in polypropylene (PP) composites to improve their mechanical properties and thermal stability. Four variations of carbon fibre addition (0%, 10%, 20% and 30% by weight) were tested. The composites were prepared using a manual moulding machine (MFM) and evaluated for tensile strength, impact strength, crystallinity and thermal stability using a universal testing machine (UTM), impact tester, differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The results showed that the addition of carbon fibre reduced tensile strength but significantly improved impact strength, crystallinity and thermal stability. The optimum carbon fibre content was found to be 30% by weight for maximum impact strength and 20% for maximum crystallinity. This research provides insight into the application of carbon fibre and aluminium oxide reinforced polypropylene composites in the automotive industry.
Sintesis Biokomposit Serat Sabut Kelapa dan Resin Poliester dengan Alkalisasi KOH Menggunakan Metode Hand Lay-Up Nisa, Khadijah Sayyidatun; Melyna, Ella; Samida, Muhammad Rizky Mubarak
Rekayasa Vol 15, No 3: Desember 2022
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v15i3.16713

Abstract

Development of bio-composite materials is growing rapidly, as these materials are light, strength, and have good resistance to corrosion. Moreover, bio-composite is one of many options to utilize agricultural waste. Polyester resin and coconut coir fiber can be utilized as matrix and filler for bio-composites. Alkalization is a method to obtain high quality cellulose from natural materials. The objective of this study is to examine the effect of KOH concentration on tensile strength and hardness of coconut coir fiber and polyester resin composite. The composite was successfully synthesized using hand lay-up method. Tensile strength and hardness tests were conducted to examine the composite’s physical properties, meanwhile Fourier Transform Infrared was employed to examine the material’s functional group. Bio-composite with coconut coir fiber and polyester ratio=40:60 yielded the highest tensile strength of 6.04 MPa. Furthermore, the composites that are synthesized with alkalization using KOH concentration of 5%wt, 10%wt, 15%wt, and no alkalization produced tensile strength 5.29, 6.92, 3.50, and 3.50 MPa respectively. In addition, the composites with KOH concentration of 5%wt, 10%wt, 15%wt, and no alkalization generated hardness 70, 73, 73, and 72 Shore D respectively. It can be concluded that the higher coconut coir fiber ratio, the higher the bio-composite’s tensile strength. 
Co-Authors Arina, Herlin Atika Pratiwi Afridana Fadila, Mitha Anifanisa Fitria Ika Aryanti Fitriyani, Noviannisa Cahya Herlin Arina Jingga Sopian, Annisa Maulana, Muhammad Iqbaal Muhammad Fadhillah Ansyari Nisa, Khadijah Sayyidatun Nulhakim, Lukman Rais Jibalautada Hamidatu Rabbi, Ahmad Rebecca Christine Ridwan, Muhammad Arsyi Arrizqi Salsabila, Shafiyah Samida, Muhammad Rizky Mubarak Shelia, Asri Octavilyanni Suyatmo, Reviana Inda Dwi Syiar, Raizy Ziman Tatang Hernas Soerawidjaja Tatang Hernas Soerawidjaja Tatang Hernas Soerawidjaja Tirto Prakoso Tirto Prakoso Vina Kusuma Wardani