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All Journal AMMA : Jurnal Pengabdian Masyarakat Jurnal Pendidikan Teknik Mesin
Ridwan Afandi
Politeknik Manufaktur Ceper
Humanities Automotive Engineering Chemistry Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Nursing Other

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PENGUATAN DAN PENGEMBANGAN JASA SERVIS MESIN JAHIT PAK HARTO DI SUKOHARJO Ridwan Afandi; Sutiyoko; Suparni; Nur Wahid Supriyadi
AMMA : Jurnal Pengabdian Masyarakat Vol. 2 No. 2 (2023): AMMA : Jurnal Pengabdian Masyarakat (INPRESS)
Publisher : CV. Multi Kreasi Media

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Abstract

Sewing machine workshop / service is one of the businesses that has developed a lot in society along with the development of science and technology. Pak Harto's sewing machine service has been established since around 1993 and runs its business in accordance with existing conditions. The number of employees as many as 4 people including the owner and financial bookkeeping has not been carried out neatly and computer-based. This certainly reduces the speed of decision-making of the service. The warehousing stock has also not been neatly arranged so that it prolongs the disbursement of spare parts to be installed. The implementation of the activity program has been carried out in part by providing assistance in bookkeeping and marketing management. Bookkeeping management is carried out by making a stock book of goods available at the beginning of each month and a daily sales book for each month. Marketing improvement is carried out by creating accounts and stalls in one of the marketplaces. The results of the program implementation are still in the implementation and monitoring stage. Activities under the terms of the program will end in 2022, but the implementation of the program is expected to continue to be carried out independently by partners. Monitoring the implementation of the program is continuously carried out taking into account the capabilities of human resources.
PERBANDINGAN SIFAT IMPAK DAN KETAHANAN API KOMPOSIT BERPENGUAT SERAT ALAM DENGAN FILLER BENTONITE CLAY Kaleb Priyanto; Andika Wibowo; Roy Tarigan; Ridwan Afandi
Jurnal Pendidikan Teknik Mesin Vol. 12 No. 2 (2025): Jurnal Pendidikan Teknik Mesin
Publisher : Program Studi Pendidikan Teknik Mesin Fakultas Keguruan dan Ilmu Pendidikan Universitas Sriwiajaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jptm.v12i2.81

Abstract

This research presents a comparative study on the impact strength and combustion resistance of polyester matrix composites reinforced with natural fibers and bentonite filler. Two types of natural fibers—pineapple leaf fiber and sansevieria fiber—were used as reinforcement, with 5% bentonite added as filler in each composite variation. Impact testing was conducted in accordance with ASTM D-4812-99, while combustion resistance was evaluated based on ASTM D-635. The results indicate that the composite reinforced with pineapple leaf fiber exhibited higher impact strength than that reinforced with sansevieria fiber, with the highest value recorded at 0.79 J/mm² for the N50B5 variation. The addition of up to 5% bentonite significantly enhanced both impact strength and combustion resistance. The S50B5 variation showed the best fire resistance performance, with a Time to Ignition (TTI) of 10.87 seconds and a Rate of Burning (ROB) of 11.63 mm/min. This improvement in combustion resistance is attributed to bentonite’s role as a filler that reduces oxygen penetration by filling gaps within the matrix and forming a protective barrier against heat. Thus, the addition of bentonite up to 5% can improve the mechanical properties and thermal resistance of polyester-based composites, and make them superior for applications that require fire and impact resistance.
Co-Authors Andika Wibowo Nur Wahid Supriyadi Priyanto, Kaleb Roy Tarigan Suparni Sutiyoko