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All Journal Rekayasa Mesin Nozel : Jurnal Pendididikan Teknik Mesin
Widyasmoro, Irvan Bayu
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Mechanical Engineering

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OPTIMIZATION OF INJECTION MOLDING PARAMETERS TO MINIMIZE SHRINKAGE AND MAXIMIZE TENSILE STRENGTH IN THE RECYCLING PROCESS OF DISPOSABLE FACE MASKS Widyasmoro, Irvan Bayu; Widiastuti, Indah; Estriyanto, Yuyun; Budiyanto, Khansa Qonitatillah
Jurnal Rekayasa Mesin Vol. 15 No. 2 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i2.1518

Abstract

Recycling used face masks into useful products is an alternative way to reduce the accumulation of medical waste during the COVID-19 period. The main objective of this study was to determine the effect of injection molding parameters of barrel temperature, molding temperature, and cooling time on tensile strength and plastic shrinkage during the recycling process of used disposable face masks. The study utilized a Design of Experiment (DoE) using the Taguchi Orthogonal L9 method. In this current study, the barrel temperatures were set at 170oC, 190oC, and 220oC. with the molding temperatures used are 45°C, 60°C, and 75°C, while the values of cooling time were 26s, 43s, and 52s. The tensile test was carried out according to the ASTM D638 type V standard for measuring the strength of materials. The findings demonstrate that the most important factor in achieving the highest tensile strength is the molding temperature, which contributes 34.54% and is best combined with a barrel temperature of 170°C, a molding temperature of 60°C, and a cooling period of 52s. By contributing 54.40% to the parameter combination of barrel temperature of 170°C, molding temperature of 45°C, and cooling time of 52s, the molding temperature becomes the most crucial factor to produce the least amount of shrinkage
OPTIMIZATION OF INJECTION MOLDING PARAMETERS TO MINIMIZE SHRINKAGE AND MAXIMIZE TENSILE STRENGTH IN THE RECYCLING PROCESS OF DISPOSABLE FACE MASKS Widyasmoro, Irvan Bayu; Widiastuti, Indah; Estriyanto, Yuyun; Budiyanto, Khansa Qonitatillah
Jurnal Rekayasa Mesin Vol. 15 No. 2 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i2.1518

Abstract

Recycling used face masks into useful products is an alternative way to reduce the accumulation of medical waste during the COVID-19 period. The main objective of this study was to determine the effect of injection molding parameters of barrel temperature, molding temperature, and cooling time on tensile strength and plastic shrinkage during the recycling process of used disposable face masks. The study utilized a Design of Experiment (DoE) using the Taguchi Orthogonal L9 method. In this current study, the barrel temperatures were set at 170oC, 190oC, and 220oC. with the molding temperatures used are 45°C, 60°C, and 75°C, while the values of cooling time were 26s, 43s, and 52s. The tensile test was carried out according to the ASTM D638 type V standard for measuring the strength of materials. The findings demonstrate that the most important factor in achieving the highest tensile strength is the molding temperature, which contributes 34.54% and is best combined with a barrel temperature of 170°C, a molding temperature of 60°C, and a cooling period of 52s. By contributing 54.40% to the parameter combination of barrel temperature of 170°C, molding temperature of 45°C, and cooling time of 52s, the molding temperature becomes the most crucial factor to produce the least amount of shrinkage
ANALISIS RISIKO DAN PENGENDALIAN BAHAYA BENGKEL PEMESINAN DI SMKS PANCASILA SURAKARTA Widyasmoro, Irvan Bayu; Zain, Lutfi Ilunsa; Pamiyanto, Joko; Misbah, Malikul; Dwi cahyanto, Muh fuad Adi; Ma’ruf, Muhammad Agus; Suwarta, Suwarta; Wijayanto, Danar Susilo; Sutrisno, Valiant Lukad Perdana
Nozel : Jurnal Pendididikan Teknik Mesin Vol 6, No 1 (2024)
Publisher : Fakultas Keguruan dan Ilmu Pendidikan Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/nozel.v6i1.84041

Abstract

This research aims to carry out an in-depth analysis regarding risks and work safety control efforts at the SMKS Pancasila Surakarta Machining Workshop, by applying the Job Safety Analysis (JSA) method. In the direct observation process, a number of potential risks have been identified, including aspects of lighting that are less than optimal, equipment storage management that is not yet fully efficient, conditions of supporting facilities that need to be improved, and a lack of awareness regarding Occupational Safety and Health (K3). This risk analysis then paves the way for the development of control measures that focus on improving lighting, better equipment storage arrangements, strategic placement of supporting facilities, installation of stabilizers on machines, and expanding K3 awareness through industrial work culture. It is hoped that these recommendations can make a significant contribution in creating a learning environment that is not only safe and comfortable, but also more productive for students and teaching staff in vocational school machining workshops. Thus, this research not only illustrates an in-depth understanding of risks in SMK machining workshops, but also offers concrete solutions to improve overall work safety conditions.
Co-Authors Budiyanto, Khansa Qonitatillah Danar Susilo Wijayanto Dwi cahyanto, Muh fuad Adi Indah Widiastuti Ma’ruf, Muhammad Agus Misbah, Malikul Pamiyanto, Joko Suwarta Suwarta Valiant Lukad Perdana Sutrisno, Valiant Lukad Perdana Yuyun Estriyanto Zain, Lutfi Ilunsa